A.簡單算術(shù)平均數(shù)
B.加權(quán)算術(shù)平均數(shù)
C.簡單調(diào)和平均數(shù)
D.加權(quán)調(diào)和平均數(shù)
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A.兩點分布
B.二項分布
C.超幾何分布
D.泊松分布
A.9組
B.10組
C.11組
D.12組
A.演繹推理
B.完全歸納推理
C.不完全歸納推理
D.非邏輯推理
A.總體大小
B.個體多少
C.理論范圍
D.具體范圍
A.概念
B.數(shù)值
C.概念和數(shù)值
D.數(shù)值尺度
最新試題
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
Which of the following statements is not true？（）
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查，以了解全國鐵路貨運概況。這種調(diào)查屬于（）
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 （）.
對某班級學(xué)生的生活狀況進行統(tǒng)計調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
A cumulative frequency polygon is also called （）.
常用的長期趨勢測定的方法有哪些？各有什么特點？
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？（）