A random sample of 41 observations was selected from a normally distributed population. The sample mean was xbar= 60, and the sample variance was s ^2 = 21.0. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 6 at the 0.05 level of significance? Use the p-value method.
State the null and alternate hypotheses
Determine which test statistic applies, and calculate it
Determine the corresponding probability, and compare to (squggley a)
State your decision: Should the null hypothesis be rejected?