A STAT 200 instructor is interested in whether there is any variation in the final exam gradesbetween her two classes Data collected from the two classes are as follows:
Her null hypothesis and alternative hypothesis are:
(a) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
(b) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit.
(c) Is there sufficient evidence to justify the rejection of 0 H at the significance level of 0.05? Explain.