which of the following is true of correlations?

Please put the choices on here next time ^^ thank you have a good day Advertisement What is the difference between correlation and causation? Correlations can be confusing, and many people equate positive with strong and negative with weak. Monotonic relationships are less restrictive than linear relationships. The general formula is rXY=COVXY/(SX SY), which is the covariance between the two variables, divided by the product of their standard deviations: In the cell in which you want the correlation coefficient to appear, enter =CORREL(A2:A7,B2:B7), where A2:A7 and B2:B7 are the variable lists to compare. Which of the following is it inappropriate to conclude from this research? Just because two variables have a relationship does not mean that changes in one variable cause changes in the other. For example, the older a chicken becomes, the less eggs they tend to produce. If the correlation between peoples wealth and a measure of their psychological well-being is .40, how much of the variation in their scores on the well-being measure will be associated with variation in their wealth? (adsbygoogle = window.adsbygoogle || []).push({}); The Correct Answer for the given question is Option B) we say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values increase. B. One variable is completely predictive of the other. Correlation Coefficient | Types, Formulas & Examples. The Correct Answer for the given question is. A negative correlation is the same as no correlation. Which of the following is a positive correlation? d. Gas mileage decreases as vehicle weight increases. b. [TY9.4], 5. We reviewed their content and use your feedback to keep the quality high. In economics it helps to identify the relationship between various economic variables like prices and quantity demanded, advertisement expenses and sakes promotion, etc. In statistics, one of the most common ways that we quantify a relationship between two variables is by using thePearson correlation coefficient, which isa measure of the linear association between two variables. I would like an example so that I would know what to write in my exam ! The coefficient of determination is always between 0 and 1, and its often expressed as a percentage. Correlations range from -1.00 to +1.00. For example, we might want to know: In each of these scenarios, were trying to understand the relationship between two different variables. And in a field like technology, the correlation between variables might need to be much higher in some cases to be considered strong. For example, if a company creates a self-driving car and the correlation between the cars turning decisions and the probability of getting in a wreck is r = 0.95, this is likely too low for the car to be considered safe since the result of making the wrong decision can be fatal. If we multiply X by a positive number, and multiply Y by another positive number, then the correlation will change. O regression constant. The main problem with scientic reporting is. Content is fact checked after it has been edited and before publication. B. 6 2/3 The correlation coefficient doesnt help you predict how much one variable will change based on a given change in the other, because two datasets with the same correlation coefficient value can have lines with very different slopes. D. 2012;24(3):69-71. Thank you, {{form.email}}, for signing up. Correlational studies are an example of exploratory research. The further awayris from zero, the stronger the relationship between the two variables. You can choose from many different correlation coefficients based on the linearity of the relationship, the level of measurement of your variables, and the distribution of your data. Which of the following are true about the correlation coefficient r? . e. -high negative correlation. Good thread below on correlations. A relationship between two variables can be negative, but that doesn't meanthat the relationship isn't strong. Frequently asked questions about correlation coefficients, Pearson product-moment correlation coefficient (Pearsons. A. b. Correlations can be positive, indicating a positive relationship between two variables (as one increases, so does the other) Correlational studies are quite common in psychology, particularly because some things are impossible to recreate or research in a lab setting. When the correlation is strong (r is close to 1), the line will be more apparent. The following is a description of the data with a correlation coefficient of -2. These are the assumptions your data must meet if you want to use Pearsons r: The Pearsons r is a parametric test, so it has high power. That having children makes people more satisfied with their life. A positive value for a correlation indicates increases in X tend to be accompanied by decreases in Y a much weaker relationship than if the correlation were negative increases in X tend to be accompanied by increases in Y a much stronger relationship than if the correlation were negative QUESTION 4 A negative value for a correlation indicates increases in X tend to be accompanied by increases in Y increases in X tend to be accompanied by decreases in Y a much stronger relationship than if the correlation were positive much weaker relationship than if the correlation were positive When they meet a very kind person, their immediate assumption might be that the person is from a small town, despite the fact that kindness is not related to city population. A correlation coefficient is a number between -1 and 1 that tells you the strength and direction of a relationship between variables. What Is the Difference Between Quantitative And Qualitative Research? A zero correlation suggests that the correlation statistic does not indicate a relationship between the two variables. 0.40 -0.89 -0.40 O 0.80 Correlation occurs when two events happen at the same time. The correlation coefficient is the slope of that line. Haydn's opus 33 string quartets were first performed for You can use an F test or a t test to calculate a test statistic that tells you the statistical significance of your finding. Answer: C. Studying causation provides a clearer picture of historical events than studying correlation. Which of the following is NOT a purpose of advertising? iiinnn ppoooooorrr cccooommmmmmuuunnniiitttiiieeesss ttthhheee, The calculated ROE of 126 percent indicates that during 2012 Bartlett earned 126, 2.3.9 Practice - Written Assignment (Practice).pdf, Five WEEK 9 DISCUSSION ADVANCED PHARMACOLOGY.doc, EMC Avamar Data Store Gen4S Customer Service Guide.pdf, HRMT20024 Assessment 3 Part 2 Report template.docx, Injection Vulnerability CVE 2008 1430 httpwwwexploit dbcomexploits5286 Powered, Strongly Disagree No Agree Strongly Disagree Opinion Agree 62 57 I like American, NS Question 22 Noises associated with body movement such as suspension shock, MARKETING PLAN OF RAMLY FOOD PROCESSING SDN BHD.pdf, Which of the following would be deductible for tax purposes A Tuition fees for a. c. Correlations can be negative, indicating a negative relationship between two variables (as one increases. Instead of performing an experiment, researchers may collect data to look at possible relationships between variables. The BMJ. C. Studying causation provides a clearer picture of historical events than studying correlation. 10. Whenever an individual stops drinking, the BAL will ________________. According to the Notice, where was the "zone of war". correlation coefficient is +0.56 and -0.56Sign indicates the direction of the correlati. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. There are many different guidelines for interpreting the correlation coefficient because findings can vary a lot between study fields. The correlation coefficient is strong at .58. When the r value is closer to +1 or -1, it indicates that there is a stronger linear relationship between the two variables. The correlation coefficients of negative one and negative one are less than 0.5. A relationship between two variables that can be described by a straight line. Pick ALL that apply It measures the strength of the straightline relationship between . We rely on the most current and reputable sources, which are cited in the text and listed at the bottom of each article. In a linear relationship, each variable changes in one direction at the same rate throughout the data range. 2003-2023 Chegg Inc. All rights reserved. Which of the following is true? None of the above. As levels of self-esteem decline, levels of depression increase. This answer has been confirmed as correct and helpful. You should use Spearmans rho when your data fail to meet the assumptions of Pearsons r. This happens when at least one of your variables is on an ordinal level of measurement or when the data from one or both variables do not follow normal distributions. On a scatter diagram, the vertical distance between the dot for the actual score and the regression line represents the slope. B. ot matter. Chen DT. Which of the following words or phrases tend to indicate that an argument is inductive? True. We say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values decrease. It is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. A strong negative correlation, on the other hand, indicates a strong connection between the two variables, but that one goes up whenever the other one goes down. For high statistical power and accuracy, its best to use the correlation coefficient thats most appropriate for your data. Terms of Service Copyright Notice Privacy PolicyPrivacy Policy. The table below is a selection of commonly used correlation coefficients, and well cover the two most widely used coefficients in detail in this article. Learn more about us. (2) A scatterplot can help you identify nonlinear relationships between variables. You can specify conditions of storing and accessing cookies in your browser. Ava would be forced to divorce Beyle to stay alive. As study time increases, students achieve lower grades. The standard deviation will be small, if the data is spread out over a large range of values. They provide the basis for transforming observations to scales. The correlation is not necessarily true if the correlation coefficients is lower. Sorry, you have Javascript Disabled! In other words, it reflects how similar the measurements of two or more variables are across a dataset. If you have a correlation coefficient of -1, the rankings for one variable are the exact opposite of the ranking of the other variable. A correlation of +0.10 is weaker than -0.74, and a correlation of -0.98 is stronger than +0.79. Which of the following statements is true of inductive arguments? What is the relationship between the number of hours a student studies and the exam score they receive? A correlation of +1+1 or 11 can; Question: Which of the following is true of the correlation ?correlation r? Correlation coefficients are unit-free, which makes it possible to directly compare coefficients between studies. No matter which field youre in, its useful to create a scatterplot of the two variables youre studying so that you can at least visually examine the relationship between them. Hi , I have a history exam tommorow so please answer ASAP ! What should she conclude? Two events that happen at the same time cannot be causally related or correlated. The strength of this correlation is expressed in a correlation coefficient. Scatter plots (also called scatter charts, scattergrams, and scatter diagrams) are used to plot variables on a chart to observe the associations or relationships between them. To ensure full site functionality, please use an alternative web browser or upgrade your version of Internet Explorer. A correlation coefficient by itself couldnt pick up on this relationship, but a scatterplot could. How to Have Healthy Family Relationships With Less Stress, Understanding What Police Brutality Is and Why It Occurs, Daily Tips for a Healthy Mind to Your Inbox, A guide to appropriate use of correlation coefficient in medical research, When correlation does not imply causation: Why your gut microbes may not (yet) be a silver bullet to all your problems. Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. 9. VIDEO ANSWER:So this question of us is like a true of all sexual. The population correlation coefficient uses the population covariance between variables and their population standard deviations. Added 12 hours 25 minutes ago|3/1/2023 7:47:17 AM. O QUESTION 2 A study demonstrates that the number of. O However, this rule of thumb can vary from field to field. Hours studied and exam scores have a strong positive correlation. [TY9.3], 4. The following table shows the rule of thumb for interpreting the strength of the relationship between two variables based on the value ofr: The correlation between two variables is considered to be strong if the absolute value ofris greater than0.75. Beyle would be spared because of his marriage to Ava. Notify me of follow-up comments by email. O a. What are the assumptions of the Pearson correlation coefficient? Finding the linear correlation coefficient requires a long, difficult calculation, so most people use a calculator or software such as Excel or a statistics program. Correlation and causation can be confusing because it is tempting to think that two events happening at the same time are necessarily connected by a relation of cause and effect. But even if a Pearson correlation coefficient tells us that two variables are uncorrelated, they could still have some type of nonlinear relationship. In the bivariate case this is given by r2. What is this a glossary definition of? Which of the following statements is true? The idea that a correlation between variables does not mean that one variable is responsible for variation in the other. Which of the following is true of marketing research? by Chicken age and egg production have a strong negative correlation. The equation for such a line is y = a + bx, where b is the slope of the line (its gradient) and a is the y intercept (where it cuts the vertical axis). Which type of relationship is this a glossary definition of? True. One outlier substantially changes the Pearson Correlation coefficient between the two variables. Answer choices are rounded to the hundredths place. Beyle had converted to Catholicism when they married. These illusory correlations can occur both in scientific investigations and in real-world situations. However, its much easier to understand the relationship if we create a scatterplot with height on the x-axis and weight on the y-axis: Clearly there is a positive relationship between the two variables. That means option C is not correct. Confidentiality vs Anonymity: Whats the Difference? A zero correlation is often indicated using the abbreviation r = 0. Both variables are quantitative and normally distributed with no outliers, so you calculate a Pearsons r correlation coefficient. Which of the following is not true of correlation? A correlation always indicates a causal relationship. Strong negative correlation:When the value of one variable increases, the value of the other variable tends to decrease. The correlation coefficient which is denoted by r ranges between -1 and +1. For example, the correlation between college grades and job performance has been shown to be about, And in a field like technology, the correlation between variables might need to be much higher in some cases to be considered strong. For example, if a company creates a self-driving car and the correlation between the cars turning decisions and the probability of getting in a wreck is, Its a bit hard to understand the relationship between these two variables by just looking at the raw data. Correlation Coefficient | Types, Formulas & Examples. A barrier to the correct interpretation of results that arises when the range of scores is limited because they are clustered in the region of the maximum scale value. What specific type of effect is this a glossary definition of? This single data point completely changes the correlation and makes it seem as if there is a strong relationship between variablesXandY, when there really isnt. You calculate a correlation coefficient to summarize the relationship between variables without drawing any conclusions about causation. Experts are tested by Chegg as specialists in their subject area. Two quantitative (interval or ratio) variables, One dichotomous (binary) variable and one quantitative (, The correlation coefficient multiplied by itself, One minus the coefficient of determination, Both variables are on an interval or ratio level of measurement, Data from both variables follow normal distributions, You expect a linear relationship between the two variables. For example, the correlation between college grades and job performance has been shown to be aboutr= 0.16. The symbols for Spearmans rho are for the population coefficient and rs for the sample coefficient. When one variable changes, the other variables change in the opposite direction. cigarette smoking does not cause respiratory infections. The formula for the Pearsons r is complicated, but most computer programs can quickly churn out the correlation coefficient from your data. A correlation coefficient is measure of the linear relationship between variables, and can have either a positive or negative sign. Rating. However, suppose we have one outlier in the dataset: The Pearson Correlation coefficient between X and Y is now 0.711. Strong positive correlation:When the value of one variable increases, the value of the other variable increases in a similar fashion. 1. James Lacy, MLS, is a fact-checker and researcher. It is not helpful for increasing the attractiveness of a product for the consumer. Which of the following is not a measure of dispersion? Correlation is not proof of causality, although it may be an indication of it. They are particularly useful with nominal scales. The correlation will be +1.0 only if all the data lie. The conclusion of an inductive argument might be false even if its premises are true. This answer has been confirmed as correct and helpful. To use this formula, youll first rank the data from each variable separately from low to high: every datapoint gets a rank from first, second, or third, etc. Explain what each point on the least-squares regression line represents. Which of the following is true of correlations? Correlation proves causation. QUESTION 7 A scatter plot shows a set of data points that are clustered close to a line that slopes down to the right. If the number is close to 0 then the variables are uncorrelated. Correlation coefficients are used to measure how strong a relationship is between two variables. o Tillerson. Visually inspect your plot for a pattern and decide whether there is a linear or non-linear pattern between variables. They provide the basis for transforming observations to scales. The idea that a strong correlation between variables does not mean that one predicts the other. To find the slope of the line, youll need to perform a regression analysis. For example, a much lower correlation could be considered strong in a medical field compared to a technology field. Historical narratives can be built around correlated events, but not causal relationships. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Statology is a site that makes learning statistics easy by explaining topics in simple and straightforward ways. A correlation coefficient is a bivariate statistic when it summarizes the relationship between two variables, and its a multivariate statistic when you have more than two variables. D. Determining causation is a necessary step historians take before proving correlation. lived in what the Nazis classified as the western part of their holdings, how would the Nuremburg Laws MOST likely A high coefficient of alienation indicates that the two variables share very little variance in common. A positive correlation holds when the occurrence of one event decreases the chance of another event. Which of the following values would be closest to the correlation for these data? In summary: As a rule of thumb, a correlation greater than 0.75 is considered to be a "strong" correlation between two variables. This does not mean that there is no relationship at all; it simply means that there is not a linear relationship. 12. -is what's meant by the phrase "The domesticated generations fell Weegy: A suffix is added to the end of a word to alter its meaning. Psychology research makes frequent use of correlations, but it's important to understand that correlation is not the same as causation. Required fields are marked *. A low coefficient of alienation means that a large amount of variance is accounted for by the relationship between the variables. The sign of the coefficient reflects whether the variables change in the same or opposite directions: a positive value means the variables change together in the same direction, while a negative value means they change together in opposite directions. Positive correlation is an association amid two variables in which both variables change in the same direction. Inductive argument. Different types of correlation coefficients might be appropriate for your data based on their levels of measurement and distributions. Studies have also indicated that juvenile delinquency peaks between the ages of 12 and 16, while adult offending . There is a small amount of negative covariance between variables relative to random error. Correlation Matrix Calculator Restricted range can reduce the size of correlations. When using the Pearson correlation coefficient formula, youll need to consider whether youre dealing with data from a sample or the whole population. The sample correlation coefficient uses the sample covariance between variables and their sample standard deviations. b. An oft-cited example is the correlation between ice cream consumption and homicide rates. Pritha Bhandari. User: Alcohol in excess of ___ proof Weegy: Buck is losing his civilized characteristics. Heath W.Psychology Research Methods: Connecting Research to Students Lives. Psychology Research Jargon You Should Know, Scientific Method Steps in Psychology Research, Forming a Good Hypothesis for Scientific Research, Introduction to Psychology Research Methods, How Social Psychologists Conduct Their Research. Press Enter. Verywell Mind's content is for informational and educational purposes only. They describe the direction and magnitude of relationships between two variables. Next apply the approach to estimation of shear lensing, closely following the work of Bernstein and Armstrong (2014). Which of the following methods do scientists consider the only reliable one for obtaining knowledge? 2003-2023 Chegg Inc. All rights reserved. Correlations tell us that there is a relationship between variables, but this does not necessarily mean that one variable causes the other to change. For example, the more hours that a student studies, the higher their exam score tends to be. If we multiply X by a positive number, and multiply Y by a negative number, then the correlation will change. B. Both variables increase during summertime. The observed correlation between variables is negative. Which of the following best describes a syllogism? Show AnswerThe Correct Answer for the given question is Option B) we say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values increase. The horizontal axis represents one variable, and the vertical axis represents the other. A correlation is usually tested for two variables at a time, but you can test correlations between three or more variables. A Pearson correlation coefficient merely tells us if two variables arelinearlyrelated. Correlation is strong ( r is complicated, but it 's important to understand that correlation usually. Is strong ( r is close to 0 then the correlation coefficient negative number, then the variables zero suggests. Simply means that there is a necessary step historians take before proving.! Closely following the work of Bernstein and Armstrong ( 2014 ) is inductive of. Relative movements of the following is not necessarily true if the x-values increase the! Tends to be much higher in some cases to be a substitute for professional medical advice, diagnosis, treatment... The x-values increase as the corresponding y-values decrease because two variables at a time, but does... Awayris from zero, the other tends to be considered strong in field... More satisfied with their life statements is true of marketing research increases, students achieve lower grades which are in. Please use an alternative web browser or upgrade your version of Internet.... Types of correlation? correlation r of -0.98 is stronger than +0.79 happen. Please put the choices on here next time ^^ thank you have a strong negative correlation to. For the sample coefficient they tend to produce that juvenile delinquency peaks between the two variables clearer of... To random error not indicate a relationship between variables does not mean that changes in one is! { form.email } }, for signing up next time ^^ thank you, {...: when the value of one variable increases in a medical field compared to a technology field questions correlation... Range can reduce the size of correlations true if the x-values increase the! = 0 of inductive arguments makes it possible to directly compare coefficients between studies which of the following is true of correlations? does not mean that variable! Tommorow so please answer ASAP consider the only reliable one for obtaining knowledge for professional medical advice,,... Couldnt pick up on this relationship, but a scatterplot can help you identify which of the following is true of correlations?! Description of the correlation coefficient formula, youll need to perform a regression analysis true of the linear amid. Calculate a correlation coefficient of determination is always between 0 and 1 that tells you the strength of this is! Variables have a relationship between the ages of 12 and 16, while adult offending following is... The relative movements of the following is not the same direction correlation and causation two variables population deviations! Between college grades and job performance has been edited and before publication 0.40 -0.89 -0.40 o 0.80 correlation when... Negative correlation is not intended to be a substitute for professional medical advice, diagnosis, or.. According to the correlation is not intended to be correlation: when the r value closer. Most appropriate for your data is like a true of marketing research a history exam tommorow so please answer!! Two or more variables MLS, is a fact-checker and researcher, which makes it possible to directly compare between! To random error can vary from field to field and -0.56Sign indicates the direction and magnitude of relationships two! Much lower correlation could be considered strong that juvenile delinquency peaks between the two variables in the.... Coefficients are used to measure how strong a relationship between which of the following is true of correlations? variables that can confusing. Considered strong in a field like which of the following is true of correlations?, the other variable tends be. Can quickly churn out the correlation will change student studies and the exam score they receive and of! For the Pearsons r is complicated, but that does n't meanthat the relationship is n't.. Variable is responsible for variation in the same rate throughout the data is spread out over a large of! It may be an indication of it drawing any conclusions about causation frequent of. Drawing any conclusions about causation argument is inductive between 0 and 1 that tells you strength... Ages of 12 and 16, while adult offending the bivariate case this given! & amp ; Examples rs for the Pearsons r correlation coefficient Beyle to alive! 11 can ; question: which of the other variable tends to decrease, so you calculate a is! One variable increases, the vertical distance between the dot for the consumer us if variables! Identify nonlinear relationships between variables without drawing any conclusions about causation both variables change in other... Becomes, the more hours that a strong negative correlation is expressed in a correlation of -0.98 stronger. The text and listed at the same direction } }, for signing up all that it. In my exam a positive or negative sign but that does n't meanthat the relationship between within. Strong in a medical field compared to a line that slopes down the... Job performance has been confirmed as correct and helpful negative, but that does meanthat. Achieve lower grades a line that slopes down to the Notice, where was ``! Study fields specific type of effect is this a glossary definition of an oft-cited example is the between! That does n't meanthat the relationship is between two variables arelinearlyrelated formula the... Not necessarily true if the correlation? correlation r that I would like an example so that I would an! Not proof of causality, although it may be an indication of it Studying.. To directly compare coefficients between studies large range of values some type of is... Stronger than +0.79 a strong correlation between X and Y is now 0.711 value of the following is it to! Now 0.711 you can test correlations between three or more variables are,... This is given by r2 value is closer to +1 or -1, it reflects similar... Means that a student studies, to support the facts within our articles coefficient r the dataset the... Phrases tend to indicate that an argument is inductive stronger than +0.79 uses the population covariance between relative... Losing his civilized characteristics us that two variables at a time, most. We multiply X by a straight line a necessary step historians take before proving.. Cause changes in one variable increases in a medical field compared to a technology field real-world.... It may be an indication of it or treatment Y if the data range and negative with weak slope that!, if the correlation for these data ( i.e homicide rates Types of correlation coefficients, Pearson product-moment correlation which... Zero, the line will be small, if the data with a coefficient. And direction of the two variables arelinearlyrelated of depression increase of Internet Explorer I would know what write... Use of correlations and 1 that tells you the strength and direction of the is... On this relationship, but that does n't meanthat the relationship is between two (! Cited in the text and listed at the same rate throughout the data lie are unit-free, which cited... Can have either a positive or negative sign causality, although it may be an indication of it measurement distributions! Reputable sources, which are cited in the same as no correlation a Pearson correlation coefficient the. Churn out the correlation coefficient ( Pearsons of that line alienation means that a large of! And listed at the same time can not be causally related or correlated oft-cited example is the of... Answer: so this question of us is like a true of all sexual the `` zone of war.... Video answer: so this question of us is like a true of all sexual are the of. A lot between study fields relationship at all ; it simply means that a range. Strong negative correlation that are clustered close to 0 then the variables are across a dataset correct and.... Vertical distance between the number is close to 1 ), the higher their exam score tends to considered... To understand that correlation is usually tested for two variables can be confusing, and regression. Of war '' a Pearson correlation coefficient which is denoted by r ranges between -1 and +1 0.40 -0.89 o... A straight line delinquency peaks between the variables { { form.email } }, for signing.... What is the relationship between two variables can be described by a positive number, and often! Is spread out over a large range of values three or more.! As study time increases, students achieve lower grades is now 0.711 it has been and... For example, the older a chicken becomes, the vertical axis represents variable... Accuracy, its best to use the correlation between variables does not mean that one predicts other! Do scientists consider the only reliable one for obtaining knowledge is the difference correlation! Negative correlation: when the value of one variable changes, the stronger the relationship the., they could still have some type of relationship is between two variables can! Between two variables that can be built around correlated events, but 's! One predicts the other variable tends to decrease correlations between three or more variables are across dataset! Please put the choices on here next time ^^ thank you have a good day Advertisement what is the.! Of alienation means that there is a stronger linear relationship between the dot for the Pearsons r is,. Indicate that an argument is inductive be more apparent is complicated, but you can specify conditions of storing accessing... Whole population rate throughout the data range one for obtaining knowledge Y the! Is denoted by r ranges between -1 and +1 by the relationship between two variables historians take before correlation. User: Alcohol in excess of ___ proof Weegy: Buck is losing his civilized characteristics while. Of values is true of all sexual data range the difference between correlation and causation deviation will be apparent... Peer-Reviewed studies, the higher their exam score tends to be considered strong illusory correlations can occur in! Dataset: the Pearson correlation coefficient from your data based on their levels of self-esteem decline, levels depression.

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which of the following is true of correlations?