A history instructor has given the same pretest and the same final examination each semester. He is interestedin determining if there is a relationship between the scores of the two tests. He computes the linear correlationcoefficient and notes that it is 1.15. What does this correlation coefficient value tell the instructor?
A) The history instructor has made a computational error.
B) There is a strong positive correlation between the tests.
C) There is a strong negative correlation between the tests.
D) The correlation is something other than linear.

Question

Quizplus · Accepted Answer

The linear correlation coefficient, which measures the strength and direction of a linear relationship between two variables, must be between -1 and 1. A value of 1.15 is outside this range, indicating a computational error.

A History Instructor Has Given the Same Pretest and the Same