Mathematics, 29.10.2019 05:31, minie66

At a university, the average cost of books per student has been $400 per student per semester. the dean of students believes that the costs are increasing and that the average is now greater than $400. he surveys a sample of 40 students and finds that for the most recent semester their average cost was $430 with a standard deviation of $80. what is the test value for this hypothesis test? test value:

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At a university, the average cost of books per student has been $400 per student per semester. the d...