A.0
B.1
C.-1
D.0.5
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A.眾數(shù)
B.中位數(shù)
C.極值
D.均值
A.簡(jiǎn)單算術(shù)平均數(shù)
B.加權(quán)算術(shù)平均數(shù)
C.簡(jiǎn)單調(diào)和平均數(shù)
D.加權(quán)調(diào)和平均數(shù)
A.兩點(diǎn)分布
B.二項(xiàng)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
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？（）
Descriptive statistics deals with methods of（）
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 （）.
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
時(shí)間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學(xué)徒工，使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無(wú)變化，則2019年職工總平均工資將（）
Which of the following is not the goal of descriptive statistics?（）
A cumulative frequency distribution would provide（）.
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 （）.
最能反映離散程度的指標(biāo)是（）