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: Individual Before After 1 264 187 2 288 216 3 274 188 4 278 200 5 283 173 6 271 224 7 295 171 8 275 187   Send data to Excel Part: 0 / 2 0 of 2 Parts Complete   Part 1 of 2     (a) Use a calculator to construct a  90%  confidence interval for the mean reduction in cholesterol level. Round your answers to at least one decimal place.   The confidence interval for the mean reduction in cholesterol level is  ,

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