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A sample of 64 observations is selected from a normal

A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the .025 significance level.

H0: µ ≤220

H1: µ <220

(a) Is this a one- or two-tailed test?

(b) What is the decision rule?

(c) What is the value of the test statistic?

(d) What is your decision regarding H0?

(e) What is the p-value? Interpret it.

H0: µ ≤220

H1: µ <220

(a) Is this a one- or two-tailed test?

(b) What is the decision rule?

(c) What is the value of the test statistic?

(d) What is your decision regarding H0?

(e) What is the p-value? Interpret it.

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