Eleven employees were put under the care of the company nurse because of high cholesterol readings. The nurse lectured them on the dangers of this condition and put them on a new diet. Shown are the cholesterol readings of the 11 employees both before the new diet and one month after use of the diet began. Construct a 98% confidence interval to estimate the population means difference of cholesterol readings for people who are involved in this program. Assume differences in cholesterol readings are normally distributed in thepopulation.
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