We recorded the average test scores in the Scholastic Assessment Test (SAT) for college-bound seniors annually for the years 1966/67 to 2015/16. Some of the scores are shown here.

	Critical Reading Score			Mathematics Score
Year	Total	Male	Female	Total	Male	Female
1966/67	543	540	545	516	535	495
1967/68	543	541	543	516	533	497
2014/15	495	497	493	511	527	496
2015/16	494	495	493	508	524	494

Draw a chart for each of the following.

a. You wish to show that both verbal and mathematics test scores for all students have not changed much over the years.

b. The exact opposite of part (a).

c.  You want to claim that there are no differences between genders.

d. You want to “prove” that differences between genders exist.