Question: Problem 16 in Chapter 11 described a study examining the effect of eating oatmeal regularly on cholesterol. Cholesterol was measured before and after adding oatmeal to the diet of a sample of \(n=9\) participants. For this sample, cholesterol scores averaged \(M_{D}=16\) points lower with the oatmeal diet with \(SS=538\) for the difference scores. Use the data to estimate how much effect oatmeal would have on the cholesterol level for the general population. Make a point estimate and a $95 \%$ confidence interval estimate of the population mean difference.

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