High Cholesterol: A group of eight individuals with high cholesterol levels were given a new...

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High Cholesterol: A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results:(a) Construct a 99.8% confidence interval for the mean reduction in cholesterol level. Let d represent the cholesterol level before treatment minus thecholesterol level after. Use tables to find the critical value and round the answers to at least one decimal place.

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