A sociologist was investigating the ages of grandparents of…
A sociologist was investigating the ages of grandparents of high school students. From a random sample of 5 high school students (labeled student A, B, C, D and E), the sociologist collected data on the current ages, in years, of the students’ maternal grandparents. The data are shown in the table below. Ages of High School Students’ Grandparents A B C D E Age of grandmother 75 70 55 75 55 Age of grandfather 74 75 65 67 60 Assuming all conditions are met, construct a 90 percent confidence interval for the population mean difference in age (age of grandmother minus age of grandfather) of the maternal grandparents of high school students. NOTE: Type in the endpoints of the interval below (only the answer). Round to THREE decimal places Lower endpoint of interval: Upper endpoint of interval: