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
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 （）.
One rule that must always be followed in constructing frequency distributions is that （）.
一個地區(qū)一定時期的商品零售額屬于（）
什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？
常用的長期趨勢測定的方法有哪些？各有什么特點？
A cumulative frequency polygon is also called （）.
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
為什么在計算平均指標(biāo)的基礎(chǔ)上還有必要進一步計算變異指標(biāo)？
A cumulative frequency distribution would provide（）.
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 （）.