A simple random sample of 100 grocery receipts was drawn from a normal population.

A simple random sample of 100 grocery receipts was drawn from a normal population. The mean and standard deviation of the sample were $120 and $25, respectively. Test the hypothesis H0: u = 125 vs H1:u not = 125 at the 10% significance level.

Test Statistic =

Critical Values(s) =

Conclusion:

Interpretation:

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Changping Wang, MA

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BSc , Wuhan Univ. China

MA, Shandong Univ.

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