A.觀測(cè)變量
B.控制變量
C.觀測(cè)變量的水平
D.控制變量的水平
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A.一個(gè)
B.二個(gè)
C.三個(gè)
D.四個(gè)
A.發(fā)病率
B.性別
C.年齡段
D.居住地區(qū)
A.Analyze→Compare Means→Means
B.Analyze→Compare Means→One-Samples T Test
C.Analyze→Compare Means→Independent-Samples T Test
D.Analyze→Compare Means→Paired-Samples T Test
A.Analyze→Descriptive Statistics→Frequencies
B.Analyze→Descriptive Statistics→Descriptives
C.Analyze→Descriptive Statistics→Crosstabs
D.Analyze→Descriptive Statistics→Ratio
A.Dichotomies
B.Categories
C.Counted
D.Range
最新試題
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些？各有什么特點(diǎn)？
A cumulative frequency distribution would provide（）.
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車(chē)間，這四個(gè)車(chē)間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少？
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 class intervals in a frequency distribution is usually between （）.
If the individual class frequency is divided by the total frequency, the result is the （）.
在組距數(shù)列中，下限就是（）
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 best to show the percentage of a total budget that is spent on each category of items？（）
某班的學(xué)習(xí)按考試成績(jī)分為60分以下，60-70，70-80，80-90，90-100，這種分組（）