您可能感興趣的試卷
你可能感興趣的試題
A.變窄
B.變寬
C.不變
D.不能確定
A.要寬
B.要窄
C.相同
D.可能寬也可能窄
A.正態(tài)分布
B.只有當(dāng)n＜30時(shí)，為正態(tài)分布
C.只有當(dāng)n≥30時(shí)，為正態(tài)分布
D.非正態(tài)分布
最新試題
The number of class intervals in a frequency distribution is usually between （）.
Descriptive statistics deals with methods of（）
品合格率指標(biāo)是（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
Which of the following is not the goal of descriptive statistics?（）
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the cumulative frequency of the third class？（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
如果居民按報(bào)告期價(jià)格購買商品需多支出40萬元，報(bào)告期商品銷售額為200萬元，則價(jià)格指數(shù)為（）
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組，請(qǐng)指出哪項(xiàng)是正確的（）
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour？（）