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Test statistic for a hypothesis test

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At a certain university, the average cost of books per student was $400 per student last semester. In a sample of 40 students this semester, their average cost was $430 with a standard deviation of $80. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?

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Solution Summary

This solution shows how to calculate the test statistic when testing a hypothesis regarding a population mean.

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