The coefficient of correlation between two variables primarily measures their:
Correct answer: B. Linear association
- A. Average difference
- B. Linear association
- C. Absolute magnitudes
- D. Percentage change
Explanation
Correlation measures the direction and strength of a linear relationship between two variables. It does not measure the average difference or percentage change between them.
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About Correlation and Regression
Correlation describes the direction and strength of association between two variables using scatter diagrams and correlation coefficients. Regression covers fitted lines, regression equations, prediction and least squares, with a clear distinction between association and causation and between estimating a response value and reversing the roles of the variables.
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