The following data represent the relationship between the number of alignment errors and the number of missing rivets for 10 different aircraft: Number of missing rivets 13, 15, 10, 22, 30, 7, 25, 16, 20, 15 Number of alignment errors 7 , 7, 5, 12, 15, 2, 13, 9, 11, 8 Estimate the expected number of alignment errors of a plane having 24 missing rivets, and compute a 90 percent confidence interval for this quantity