Recall the method used to obtain a confidence interval for the difference between two population means for matched samples.

a) The following data are from matched samples taken from two populations. Compute the difference value for each element. (UsePopulation 1?Population 2.)

Population Element 1 2 Difference H 11 6 2 7 6 3 9 4 4 12 5 5 13 8 6 15 13 7 15 12