5. Consider the hypothesis test H0 : μ = 18, Ha :μ ≠ 18. A sample of size 20 provided a sample mean of 17 and a sample standard deviation of 4.5.
a. 3pts.Compute the test statistic.
b.3pts. Find the p-value at the 5% level of significance, and give the conclusion.
c. 5pts.Make a 99% confidence interval for the population mean.
d. 5pts.Suppose you have 35 observations with mean17 and S.d. 4.5. Make a 90% confidence interval for the population mean.
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