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)
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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
A.柱狀圖
B.直方圖
C.折線圖
D.散點(diǎn)圖
E.立方圖
A.推斷誤差
B.不確定性
C.邏輯錯(cuò)誤
D.不可行性
E.外延錯(cuò)誤
最新試題
The number of class intervals in a frequency distribution is usually between （）.
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 （）.
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（）
在組距數(shù)列中，下限就是（）
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
以2000年a0為最初水平，2016年an為最末水平，計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí)，須開（）
變量數(shù)列中，各組頻率之和應(yīng)（）
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？（）
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）