Quantity A: n is an integer less than 1 the standard deviation of 1, 2, nQuanti

游客2024-01-12  16

问题 Quantity A: n is an integer less than 1 the standard deviation of 1, 2, n
Quantity B: the standard deviation of 1, 2, 1

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 n为小于1的整数,那么显然1,2,n比1,2,1的分布要稀疏,更加远离平均值,因此1,2,n的标准方差比1,2,1的标准方差大,选择A。
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