At a certain university, the average cost of books was $400 per student last semester and...
-
At a certain university, the average cost of books was $400 per student last semester and the population standard deviation was $75. This semester a sample of 55 students revealed an average cost of books of $435 per student. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
0.47
0.64
3.46
25.67
Homework Answers
solution
Test statistic = z
= (
- 
) / 
/ 
n
= (435-400) / 75 /
55
=3.46
Test statistic = 3.46
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