Problem Solving
试题详情
题目：
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?
选项:
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
答案:
D
提问：
老师，我这题看不懂，我以为他说那一条线段分为5分或者7份然后找最小差值，所以选了C，请May老师解答一下[img=/resource/2019-04/14874-1555770910.jpeg]
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