Mathematics, 15.07.2021 16:50, angelyce4142

A sample of 31 observations is selected from a normal population. The sample mean is 69, and the population standard deviation is 8. Conduct the following test of hypothesis using the 0.01 significance level. H0: μ = 72
H1: μ ≠ 72
a. Is this a one- or two-tailed test?
b. What is the decision rule?
c. What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
d. What is your decision regarding H0?

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A sample of 31 observations is selected from a normal population. The sample mean is 69, and the pop...