Question

The test scores of the students in four classes are summarized below. Answer the questions about them.
Class A: The range of scores is
42
and the mean score is
98
.
Class B: The range of scores is
36
and the mean score is
99
.
Class C: The range of scores is
38
and the mean score is
94
.
Class D: The range of scores is
40
and the mean score is
102
.
(a) Based on the information above, which class's scores have the least variability?

Class A
Class B
Class C
Class D
(b) Based on the information above, which class has the highest scores on average?

Answer 1

(a) Based on the information above, Class C has the least variability as it has the smallest range of scores (38).

(b) Based on the information above, Class D has the highest scores on average as it has the highest mean score (102).