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The table above lists the rainfall, in centimeters, for June, July, and August in selected cities. Based on the information given,which of the following statements are true?

Indicate all such statements.

AIn City A, the percent decrease in the rainfall from June to July was equal to the percent increase in the rainfall from July to August.
BIn City C, the rainfall for July was greater than the average (arithmetic mean) of the rainfall amounts for June, July, and August.
CThe standard deviation of the rainfall amounts for June, July, and August in City E was greater than that in City C.

B,C显示答案

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5.2.8 标准差

以上解析由考满分老师提供。

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