题目内容
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纠错
A list of numbers from 20 to 40 has a standard deviation of x. By which of the following methods will the standard deviation decrease the most?
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A Subtracting 20 from all the numbers
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BSubtracting 10 from all the numbers
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CDividing all the numbers by 2
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DMultiplying all the numbers by 0.1
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ETurning all the numbers to the 80% of the original
D显示答案
