(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).
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?
(b) Based on the information above, Class D has the highest scores on average as it has the highest mean score (102).
Given the ranges:
Class A: 42
Class B: 36
Class C: 38
Class D: 40
We can see that Class B has the smallest range, which means it has the least variability.
Therefore, the answer is: Class B.
(b) To determine which class has the highest scores on average, we need to compare the mean scores.
Given the mean scores:
Class A: 98
Class B: 99
Class C: 94
Class D: 102
We can see that Class D has the highest mean score.
Therefore, the answer is: Class D.