A statistics teacher wants to see if there is any difference inthe abilities of students enrolled in statistics today and thoseenrolled five years ago. A sample of final examination scores fromstudents enrolled today and from students enrolled five years agowas taken. You are given the following information.
today (population 1) Five years ago (population 2)
sample mean 86 88
sample variance 112.5 54
sample size 45 36
The 92.50% confidence interval for the difference between thetwo population means is (round your answer to 2 decimalplaces).
