A random sample of 121 observations from a population with standard deviation 50 yielded a sample mean

Question:

A random sample of 121 observations from a population with standard deviation 50 yielded a sample mean of 120.

a. Test the null hypothesis that m = 110 against the alternative hypothesis that m 7 110, using a = .05.

Interpret the results of the test.

b. Test the null hypothesis that m = 110 against the alternative hypothesis that m 110, using a = .05.

Interpret the results of the test.

c. Compare the p-values of the two tests you conducted.

Explain why the results differ.

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