A.總體中各個個體之間的差異程度
B.樣本容量的大小
C.總體中個體數(shù)的多少
D.樣本的抽取方式
E.抽樣調(diào)查中登記誤差的大小
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A.一致性
B.無偏性
C.有效性
D.充分性
E.穩(wěn)健性
A.各組的變量值
B.各組的次數(shù)
C.各組的組中值
D.各組的頻率
E.各組的密度
A.均值大于中位數(shù)
B.均值小于眾數(shù)
C.中位數(shù)小于眾數(shù)
D.均值等于眾數(shù)
E.均值小于中位數(shù)
A.數(shù)學期望為0
B.標準差為1
C.方差為1
D.偏度系數(shù)為0
E.峰度系數(shù)為3
A.數(shù)學期望為p
B.數(shù)學期望為q
C.方差為p+q
D.方差為pq
E.方差為p/q
最新試題
常用的長期趨勢測定的方法有哪些?各有什么特點?
Which of the following statements is not true?()
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組,請指出哪項是正確的()
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要了解某地區(qū)全部大學生的就業(yè)情況,那么()
Descriptive statistics deals with methods of()
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?()
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 ().
品合格率指標是()
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