A professor teaches two sections of a class, one on MWF for 50 minutes per day and another on T/TH for 75 minutes per day. Use the following information to construct a scatter diagram with test # on the x-axis and score on the y-axis

Should the professor argue for a change in the university's scheduling?

MWF Section Test Results Test # T/Th Test Results
75 1 82
70 2 77
65 3 73
65 4 70
70 5 76

It appears that the T/TH section consistently scores higher than the MWF section. Perhaps the instructor should ask for MWF to be changed to MW with longer sessions, although the sample size is small.