Bootstrap

a. If paired sample data (x, y) are such that the values of x do not appear to be from a population with a normal distribution, and the values of y do not appear to be from a population with a normal distribution, does it follow that the values of d will not appear to be from a population with a normal distribution?

b. For the hypothesis test described in Exercise 21, use the temperatures in degrees Fahrenheit and find the 95% confidence interval estimate of md based on 1000 bootstrap samples. Generate the bootstrap samples using the values of d.