A.提高
B.下降
C.不變
D.條件不夠,無(wú)法判斷
您可能感興趣的試卷
你可能感興趣的試題
A.每個(gè)組的最小值
B.每個(gè)組的最大值
C.全距中的最大值
D.全距中的最小值
A.80%~89%,90%~99%,100%~109%,110%以上
B.80%以下,80.1%~90%,90.1%~100%,100.1%~110%
C.90%以下,90%~100%,100%~110%,110%以上
D.85%以下,85%~95%,95%~100%,105%~115%
A.小于1
B.等于1
C.大于1
D.不等于1
A.普查
B.抽樣調(diào)查
C.重點(diǎn)調(diào)查
D.典型調(diào)查
A.年齡
B.學(xué)習(xí)成績(jī)
C.專業(yè)
D.個(gè)人愛(ài)好
最新試題
變量數(shù)列中,各組頻率之和應(yīng)()
對(duì)全國(guó)各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查,以了解全國(guó)鐵路貨運(yùn)概況。這種調(diào)查屬于()
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 cumulative frequency of the third class?()
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 polygon is also called ().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
最能反映離散程度的指標(biāo)是()
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
The number of class intervals in a frequency distribution is usually between ().