Which of the following statistical measures is most helpful for indicating the extent to which people's happiness predicts the number of friends they have?
A) standard deviation
B) median
C) mean
D) correlation coefficient

Question

Quizplus · Accepted Answer

The correlation coefficient measures the strength and direction of the relationship between two variables, in this case, happiness and number of friends. A positive correlation coefficient would indicate that as happiness increases, the number of friends increases as well. Therefore, the correlation coefficient is the most helpful statistical measure to indicate the extent to which people's happiness predicts the number of friends they have.

Which of the Following Statistical Measures Is Most Helpful for Indicating