题目内容
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题目材料：
The only possible scores on the test were integers between 0 and 10. No one received a score of 0 or 1. The mean score was 6.72 and the standard deviation was 2.98.
Examinees who received a score of 6 or more passed the test. Which of the following is closest to the average (arithmetic mean) score of the examinees who passed the test?
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A$$7\frac{1}{2}$$
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B8
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C$$8\frac{1}{2}$$
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D9
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E$$9\frac{1}{2}$$
C显示答案
