10.5 The following n = 10 observations are a sample from a normal population: 7.4 7.1 6.5 7.5 7.6 6.3 6.9 7.7 6.5 7.0

a. Find the mean and standard deviation of these data.

b. Find a 99% upper one-sided confidence bound for the population mean .

c. Test Ho=7.5 versus Ha: <7.5. Use a = 0.01.

d. Do the results of part b support your conclusion in part c?