【判断题】【消耗次数：1】
分层随机抽样中各层之间具有相同性。
①
对
②
错
参考答案：
复制
纠错
相关题目
【单选题】
分层随机抽样特征为（）。
①
层之间有异质性，层内部具有同质性；
②
层之间有同质性，层内部具有异质性；
③
层之间有同质性，层内部具有同质性；
④
层之间有异质性，层内部具有异质性。
【多选题】
简单随机抽样
①
试用于总体各单位呈均匀分布的总体
②
适用于总体各单位标志变异较大的总体
③
在抽样之前要求对总体各单位加以编号
④
最符合随机原则
⑤
是各种抽样组织形式中最基本最简单的一种形式
随机题目
【判断题】
Respect for the law is the foundation of civilized living who breaks it will be punished.
①
正确
②
错误
【单选题】
— Who on earth could it be?— It was ____ other than Peter.
①
none
②
nothing
③
not
④
nobody
【单选题】
One-room schoolhouses can still be found in ___ areas where there are no other schools for many miles.
①
disposed
②
deserted
③
isolated
④
abandoned
【单选题】
Before the final examination, many students have shown ___ of tension. Some have trouble in sleeping while others have lost their appetite.
①
anxiety
②
marks
③
signs
④
remarks
【单选题】
—Yangyang carried off the first winter Olympic ___ medal for China.—Great! What ____ she won for our motherland!
①
golden/ honor
②
gold/ honor
③
golden/ honors
④
gold/ honors
【单选题】
When you do exercises, your heart works better. It is able to____ more blood while beating more slowly.
①
produce
②
pump
③
increase
④
bump
【单选题】
When college students ___ future employment, they often think of status, income, and prestige.
①
demand
②
assume
③
apply
④
anticipate