Question: A random sample of 41 observations was selected from a normally

distributed population. The sample mean was x = 61, and the sample variance was s² = 18.0. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 4 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 α
??State your decision: Should the null hypothesis be rejected?