A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 3.50.A sample of 36 honors students is taken and is found to have a mean GPA equal to 3.60.The population standard deviation is assumed to equal 0.40.At a 5% significance level,the critical value(s)is(are)________.
A) 1.645
B) 1.690
C) -1.96 and 1.96
D) -2.030 and 2.030

Question

Quizplus · Accepted Answer

Since the test is one-tailed (the university wants to show the mean GPA exceeds 3.50), the critical value for a 5% significance level in a one-tailed test is 1.645.

A University Is Interested in Promoting Graduates of Its Honors