A random sample of 51 observations was selected from a normally distributed population. The sample mean was

Question:

A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 98.2 and the sample variance was s2 = 37.5 Does this sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance?
a. Solve using the p-value approach.
b. Solve using the classical approach.