Use the information to answer the following questions. Jocelyn and Kari’s math quiz scores are shown.

Jocelyn: 86, 87, 95, 72, 78, 80

Kari: 88, 78, 93, 81, 75, 92

Activity 1 of 2
Part A: Based on the samples, which student generally has higher quiz scores?

A.
Kari, because the mean and median of her scores is 84.5.

B.
Kari, because the range of her scores is 18.

C.
Jocelyn, because the interquartile range of her scores is 9.

D.
Jocelyn, because she had a maximum score of 95.

Activity 2 of 2
Part B: Suppose both girls got a 90% on their next math quiz. Which student will see a greater increase in her overall math grade?

A.
Jocelyn, because her grade will increase by 1 point.

B.
Kari, because her grade will increase by 0.8 points.

C.
Kari, because her grade will increase to 85.3.

D.
Jocelyn, because her grade will increase to 84.