题目内容

当n小于30时，t分布的分散程度与标准正态相比，（）。

A. 前者小于后者
B. 后者小于前者
C. 关系不确定
D. 两者相等

查看答案

搜索结果不匹配？点我反馈

更多问题

抽样误差的定义是（）。

A. 抽样指标和总体指标之间抽样误差的可能范围
B. 抽样指标和总体指标之间抽样误差的可能程度
C. 样本的估计值与所要估计的总体指标之间数量上的差别
D. 抽样平均数的标准差

影响抽样误差的因素有（）。

A. 抽样方法
B. 样本容量
C. 总体方差
D. 抽样组织方式

通常评价优良估计量的标准有（）。

A. 可靠性
B. 一致性
C. 有效性
D. 无偏性

[音频][音频][音频]Has anyone bought furniture for you?Not that I can _. In the past, people used to give furniture as _ presents, but that doesn't happen nowadays and it would be quite _ to buy someone a piece of furniture as a birthday gift.What kind of furniture would you like to buy?I've got my one a new _, but I've just got a kitten and she is using my _ one as a scratching post so that is out of the _ at the moment, I am afraid.Which piece of furniture in your home do you like best?Without a shadow of doubt, my bed. I love getting into bed. It's _ comfy and it feels like a safe haven for me. I can off from work and just ___ out.