Quantity A: The standard deviation of the numbers 45, 64, 83, and 53 Quantity B: The standard deviation of the numbers 55, 81, 4

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问题 Quantity A: The standard deviation of the numbers 45, 64, 83, and 53
Quantity B: The standard deviation of the numbers 55, 81, 47, and 62

选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.

答案A

解析 45=47-2,53=55-2,64=62+2,83=81+2,由此可见Quantity A和Quantity B两个数列平均值相等,而Quantity A数列中的数与平均值差距更大。故答案为A。
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本试题收录于: GRE QUANTITATIVE题库GRE分类
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