do students in 8 am chemistry class send more email to their professors than students in 10 am chemistry class? to test that hypothesis, the number of emails sent during the semester is recorded for 25 students in the 8 am class and 35 students in the 10 am class. the average for the 8 am students (group 1) is 5.1 emails and the average for the 10 am students (group 2) is 4.4 emails .