9.10 A random sample of n = 25 is obtained from a population with variance s2, and the sample mean is computed to be x = 70. Consider the null hypothesis H0 : m = 80 versus the alternative hypothesis H1 : m 6 80. Compute the p-value for the following options.

a. The population variance is s2 = 225.

b. The population variance is s2 = 900.

c. The population variance is s2 = 400.

d. The population variance is s2 = 600.

Application Exercises