10.52 A random sample of size n = 7 from a normal population produced these measurements: 1.4, 3.6, 1.7, 2.0, 3.3, 2.8, 2.9.

a. Calculate the sample variance, s.

b. Construct a 95% confidence interval for the population variance, o.

c. Test Hoo = 0.8 versus H, 0.8 using a=0.05. State your conclusions.

d. What is the approximate p-value for the test in part c?