A.一致性
B.無(wú)偏性
C.有效性
D.充分性
E.穩(wěn)健性
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A.各組的變量值
B.各組的次數(shù)
C.各組的組中值
D.各組的頻率
E.各組的密度
A.均值大于中位數(shù)
B.均值小于眾數(shù)
C.中位數(shù)小于眾數(shù)
D.均值等于眾數(shù)
E.均值小于中位數(shù)
A.數(shù)學(xué)期望為0
B.標(biāo)準(zhǔn)差為1
C.方差為1
D.偏度系數(shù)為0
E.峰度系數(shù)為3
A.數(shù)學(xué)期望為p
B.數(shù)學(xué)期望為q
C.方差為p＋q
D.方差為pq
E.方差為p/q
A.概率分布表
B.概率分布圖
C.概率分布函數(shù)式
D.回歸函數(shù)式
E.方差分析表
最新試題
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？（）
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？（）
如果居民按報(bào)告期價(jià)格購(gòu)買商品需多支出40萬(wàn)元，報(bào)告期商品銷售額為200萬(wàn)元，則價(jià)格指數(shù)為（）
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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（）
對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
某廠某年職工勞動(dòng)生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）
A cumulative frequency distribution would provide（）.
The number of class intervals in a frequency distribution is usually between （）.