A.a probability function
B.a random variable
C.thee xpected value
D.random function
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A.0.4332
B.0.9332
C.0.0668
D.0.5668
A.1.1022
B.2
C.30
D.1.4847
A.12.5
B.8
C.0.64
D.1.25
最新試題
變量數(shù)列中，各組頻率之和應(yīng)（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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（）
One rule that must always be followed in constructing frequency distributions is that （）.
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？（）
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)工資水平均無變化，則2019年職工總平均工資將（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
The number of class intervals in a frequency distribution is usually between （）.
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（）