题目内容
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Quantity A
The standard deviation of the five numbers 10, 30, 50, 70, and 90
Quantity B
The standard deviation of the five numbers 10, 45, 50, 55, and 90
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AQuantity A is greater.
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BQuantity B is greater.
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CThe two quantities are equal.
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DThe relationship cannot be determined from the information given.
A显示答案