Question

Nationally, the average number of hours college students contributed to a governor’s election campaign to be no more than 10 hours a week. A random sample of 100 students averaged 8 hours a week with a standard deviation of 3 hours. Test the hypothesis that students in this sample contributed less hours to the campaign than the national college population? Set α=.05 level. What is the critical value for the test?

A) -1.96

B) 1.96

C) 1.64

D)-1.64

Answer 1

solution

given that

α=0.05

Z$\alpha$ = Z0.05 = -1.64 ( Using z table )