A STAT 200 instructor is interested in whether there is any

A STAT 200 instructor is interested in whether there is any variation in the final exam grades between her two classes Data collected from the two classes are as follows: n_1 = 28, x-_1 = 80, s_1 = 16 n_2 = 25, x-_2 = 75, s_2 = 12 Her null hypothesis and alternative hypothesis are: Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit. Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit. Is there sufficient evidence to justify the rejection of H_0 at the significance level of 0.05? Explain.

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