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9.2.13 A random sample of 35 SEC Division I football defensive lineman have an average weight...


9.2.13 A random sample of 35 SEC Division I football defensive lineman have an average weight of 359.133 pounds with a standard deviation of 33.436 pounds. A random sample of 32 Big 12 Division I defensive lineman have an average weight of 357.467 pounds with a standard deviation of 33.084 pounds.

a. Construct a 90% confidence interval for the difference between the average weight of a football defensive lineman in the SEC versus the Big 12.
b. Are Division I football defensive lineman bigger in the SEC than in the Big 12? Use a significance level of 0.10.

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