均数和标准差的关系是（）。 -题库考试答案搜索网

均数和标准差的关系是（）。

单选题

2021-12-29 23:02

A、均数越大，标准差越小
B、均数越大，标准差越大
C、标准差越大，均数对各变量值的代表性越好
D、标准差越小，均数对各变量值的代表性越好
E、标准差越大，均数的抽样误差越小

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正确答案

D

试题解析

均数是描述资料集中趋势的指标，标准差是描述资料离散程度的指标。标准差越小意味着变量的离散趋势越小，变量与均数之间的变异也越小，均数对变量值的代表性越好。

标签：传染性疾病控制疾病控制(医学高级) 环境卫生综合练习环境卫生(医学高级)

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