11-34. A group of 10 enrollees are weighed at the beginning and at the end of a special combined diet and exercise program. Let the random variable

(expressed in pounds) depict the weight difference (postprogram less preprogram).
Suppose D is approximately normally distributed with values:
−5.7, 1.0, −6.2, −9.8, −3.0, 2.4, −11.1, −1.2, −8.2, and 4.0. Find a 90%
confidence interval for μD = μX − μY.