在準備GMAT考試,看到這題目,根本沒看懂題目的意思,請高手幫忙看下:
A researcher computed the mean,the median,and the standard deviation for aset 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
請教,這題目是啥意思阿...
所有跟帖:
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answer: D
-I_am_nobody2-
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12/06/2009 postreply
18:00:20
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大概是D,標準方差變化應該很小。
-johnz002-
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12/14/2009 postreply
14:25:33
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回複:請教,這題目是啥意思阿...
-davidmpang-
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12/15/2009 postreply
21:39:00