A professor finds that the average SAT score among all students attending his college is 1150±150 ( ).He polls his class of 25 students and finds that the average SAT score is 1200.Suppose he computes a one-sample z test at a .05 level of significance.What is his decision?
A)to reject the null hypothesis
B)to retain the null hypothesis
C)to reject the null hypothesis for a two-tailed test,but to retain the null hypothesis for an upper-tailed test
D)to reject the null hypothesis for an upper-tailed test,but to retain the null hypothesis for a two-tailed test

Question

A professor finds that the average SAT score among all students attending his college is 1150±150 (  ).He polls his class of 25 students and finds that the average SAT score is 1200.Suppose he computes a one-sample z test at a .05 level of significance.What is his decision?
A)to reject the null hypothesis 
B)to retain the null hypothesis 
C)to reject the null hypothesis for a two-tailed test,but to retain the null hypothesis for an upper-tailed test 
D)to reject the null hypothesis for an upper-tailed test,but to retain the null hypothesis for a two-tailed test

Quizplus · Accepted Answer

The Answer of A professor finds that the average SAT score among all students attending his college is 1150±150 (  ).He polls his class of 25 students and finds that the average SAT score is 1200.Suppose he computes a one-sample z test at a .05 level of significance.What is his decision?
A)to reject the null hypothesis 
B)to retain the null hypothesis 
C)to reject the null hypothesis for a two-tailed test,but to retain the null hypothesis for an upper-tailed test 
D)to reject the null hypothesis for an upper-tailed test,but to retain the null hypothesis for a two-tailed test

A Professor Finds That the Average SAT Score Among All