Nutritional researchers conducted an investigation of high fiber diets intended to reduce serum cholesterol level. Twenty men with high serum cholesterol were randomly allocated to receive an "oat" diet (treatment 1) or a placebo (treatment 2) for 21 days. The following table summarizes the decrease (before – after) in serum cholesterol levels. Diet sample size (n) sample mean Oat Placebo 10 10 53.6 14.2 sample standard deviation (s) 31.1 29.5 (a) Construct a 95% confidence interval for the difference of the mean decreases in serum cholesterol levels from the men taking the two diets. Assume normal populations and population variances are equal. (b) Based on the confidence interval in (a), can we conclude that high fiber diets help to reduce serum cholesterol level? Why?

Q: can you also answer F

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A: STEP 1;  TO FIND VALUE OF a see below;

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A:

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A: To find the equation of the line tangent to the curve  at the point  on the curve.

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A: there is only one variable to find the solution.

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