A.觀測變量
B.控制變量
C.觀測變量的水平
D.控制變量的水平
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A.一個
B.二個
C.三個
D.四個
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
The number of class intervals in a frequency distribution is usually between （）.
某企業(yè)的生產計劃完成百分比采用如下分組，請指出哪項是正確的（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
變量數(shù)列中，各組頻率之和應（）
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？（）
最能反映離散程度的指標是（）
品合格率指標是（）
時間序列構成因素有哪些？分解的基本原理和思路是什么？
If the individual class frequency is divided by the total frequency, the result is the （）.
一個地區(qū)一定時期的商品零售額屬于（）