Data on the amount of time spent studying and the exam score of 150 students at a high school were collected. You want to know if a student's exam score is linearly related to the amount of time spent on studying. Which of the following would you compute?
A) arithmetic mean
B) median
C) coefficient of variation
D) coefficient of correlation

Question

Quizplus · Accepted Answer

To determine if there is a linear relationship between two variables, we would compute the coefficient of correlation. This would give us a numerical value that represents the strength and direction of the relationship between the two variables. The arithmetic mean and median are measures of central tendency and do not give information about the relationship between variables. The coefficient of variation is a measure of relative variability and is not relevant in this situation.

Data on the Amount of Time Spent Studying and the Exam