A.68%
B.95%
C.99.7%
D.none of the above
您可能感興趣的試卷
你可能感興趣的試題
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
A.median；mean
B.data point；mean
C.quartile；median
D.data point；median
A.approximation theorem
B.normal probability theorem
C.central limit theorem
D.central normality theorem
A.sample based upon information contained in the population
B.population based upon information contained in the sample
C.population based upon information contained in the population
D.mean of the sample based upon the mean of the population
最新試題
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？（）
如果居民按報告期價格購買商品需多支出40萬元，報告期商品銷售額為200萬元，則價格指數(shù)為（）
一個地區(qū)一定時期的商品零售額屬于（）
The number of class intervals in a frequency distribution is usually between （）.
Descriptive statistics deals with methods of（）
A cumulative frequency distribution would provide（）.
If the individual class frequency is divided by the total frequency, the result is the （）.
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查，以了解全國鐵路貨運概況。這種調(diào)查屬于（）
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？
某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學(xué)徒工，使學(xué)徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）