Reference no: EM13903300
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:
Section 1: n1 = 28, x1- = 80, s1 = 16
Section 2: n2 = 25, x2- = 75, s2 = 12
Her null hypothesis and alternative hypothesis are:
H0: = σ12 - σ22, and Ha: σ12 > σ22
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 H0 at the significance level of 0.05? Explain.
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