A.均大于0
B.均等于0
C.均小于0
D.均不為0
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A.線性函數(shù)依存關系
B.確定性的數(shù)量依存關系
C.非線性函數(shù)依存關系
D.非確定性的數(shù)量依存關系
A.相互關聯(lián)
B.互不相關
C.計量逐步精確
D.方法逐步改進
A.側檢驗
B.左側檢驗
C.雙側檢驗
D.上側檢驗
A.精確假設
B.非精確假設
C.復合假設
D.備擇假設
A.28.35小時
B.28.59小時
C.29.61小時
D.30.02小時
最新試題
A cumulative frequency polygon is also called （）.
要了解某地區(qū)全部大學生的就業(yè)情況，那么（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.
常用的長期趨勢測定的方法有哪些？各有什么特點？
最能反映離散程度的指標是（）
品合格率指標是（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
If the individual class frequency is divided by the total frequency, the result is the （）.
The number of class intervals in a frequency distribution is usually between （）.