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单选题
Eighteen students took an 8-question quiz. The graph in Figure 8 shows the number of students who earned each possible score from 0 to 8. What is the median for the quiz scores?
A

5.3

B

5

C

4

D

6

E

5.5


参考答案

参考解析
解析:
The graph shows the set of scores as: {2, 3, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8}. Since the scores are in order from lowest to highest, simply count over to the middle value to determine the median. The median is the average of the ninth and tenth terms. In this example, both the ninth and tenth terms are 5, so the median is 5.
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