SOLUTION: At a certain university, the average cost of books per student was $330 per student last semester. In a sample of 50 students this semester, their average cost was $355 with a stan

Question 273221: At a certain university, the average cost of books per student was $330 per student last semester. In a sample of 50 students this semester, their average cost was $355 with a standard deviation of $85. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
At a certain university, the average cost of books per student was $330 per student last semester.
In a sample of 50 students this semester, their average cost was $355 with a standard deviation of $85.
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
--------
test stat
t(355) = (355-330)/[85/sqrt(50)] = 2.0797..
=============
Cheers,
Stan H.

RELATED QUESTIONS
At a certain university, the average cost of books per student was $330 per student last... (answered by yuendatlo)

At a university, the average cost of books per student has been $600 per student per... (answered by stanbon)

Give the probability in decimal form (correct to two decimal places). A calculator may be (answered by reviewermath)

Last year's freshman class at Big State University totaled 5,346 students. Of those,... (answered by greenestamps)

Last semester, a certain professor gave 40 As out of 388 grades. If one of the... (answered by ewatrrr)

Last semester, a certain professor gave 18 As out of 233 grades. If one of the... (answered by jim_thompson5910)

a researcher conducted a survey on a university campus for a sample of 64 seniors and... (answered by ewatrrr)

Question text Records at a certain university show that the cost of books purchased by... (answered by ewatrrr)

The average GPA of students in 2001 at a private university was 3.37. A survey on a... (answered by Theo)