DU Test for Equal Means Spreadsheet
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professor is concerned that the two sections of applied statistics he teaches are not performing at the same level. To test his claim, he looks at the mean exam score for a random sample of students from each class. In Class A, the mean exam score for 13 students is 75.3 with a standard deviation of 6.0. In Class B, the mean exam score for 17 students is 80.1 with a standard deviation of 6.2. Test the professor’s claim at the 0.05 level of significance. Assume that the population variances are equal.
Once you feel your first post is correct, support your conclusion with an appropriate confidence interval.
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