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A.binomial
B.uniform
C.normal
D.Possion
A.68%
B.95%
C.99.7%
D.none of the above
A.the variance is not as accurate a measurement as the standard deviation
B.the standard deviation has been corrected for bias while the variance has not
C.the standard deviation is in the same units as the data values.
D.the variance is in the same units as the data values.
A.square
B.absolute value
C.minimum
D.maximum
最新試題
Descriptive statistics deals with methods of（）
One rule that must always be followed in constructing frequency distributions is that （）.
Which of the following statements is not true？（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
A cumulative frequency polygon is also called （）.
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？（）
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)？
A cumulative frequency distribution would provide（）.
品合格率指標(biāo)是（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）