The principal of a school wanted to see how the SAT scores compared when given two different programs of study. A total of 30 students were randomly assigned to two
equal sized groups. Group 1 was assigned to take an SAT class during the school day
every other day and Group 2 was assigned to a local prep class on Saturdays. The
final SAT scores for each group are shown in the table below. What inference can be
made about the results?
Group 1
Group 2
290
430
420
590
580
590
590
590
480
380
550
450
540
660
250
550
590
480
640
640
490
450
580
320
500
590
390
560
580