A sales manager was interested in determining if there is a relationship between college GPA and sales performance (number of units sold) among salespeople hired
Within the last year. The correct null hypothesis is
A) There is no relationship between GPA and sales performance.
B) There is a relationship between GPA and sales performance.
C) β1 = 0
D) Both A and C.
E) None of these

Question

Quizplus · Accepted Answer

The null hypothesis is that there is no relationship between GPA and sales performance, which is option A. Option C, β1 = 0, is also the same as option A, as β1 refers to the coefficient of the GPA variable in the regression equation. Therefore, the correct null hypothesis is either A or C. Option D includes both A and C, which is also correct. Option B is the opposite of the null hypothesis and assumes there is a relationship, which is not the testable hypothesis in this case. Option E is not a valid choice as it does not provide an alternative hypothesis.

A Sales Manager Was Interested in Determining If There Is