Before Calculating a Pearson Correlation Coefficient, It Is Advisable to Plot

question 53

Multiple Choice

Before calculating a Pearson correlation coefficient, it is advisable to plot the data because

• A) one must be sure that the underlying relationship between the two variables is linear.
• B) the diagram is more informative than the correlation coefficient regarding causality.
• C) one must make sure that the data are from a truncated range.
• D) the correlation coefficient cannot show the direction of the relationship.

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