题目信息
A researcher computed the mean, the median, and the standard deviation for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?
A:The mean only
B:The median only
C:The standard deviation only
D:The mean and the median
E:The mean and the standard deviation
参考答案及共享解析
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已选答案：
正确答案：
D:The mean and the median
*考点：统计
*解析：
平均数会变，中位数虽然位置不变，但数值会变。标准差不会变，随便举例即可。选D
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