A.分類(lèi)變量
B.分組變量
C.匯總變量
D.目標(biāo)變量
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最新試題
A cumulative frequency distribution would provide().
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?()
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些?各有什么特點(diǎn)?
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
The number of class intervals in a frequency distribution is usually between ().
If the individual class frequency is divided by the total frequency, the result is the ().
某班的學(xué)習(xí)按考試成績(jī)分為60分以下,60-70,70-80,80-90,90-100,這種分組()
在組距數(shù)列中,下限就是()
如果居民按報(bào)告期價(jià)格購(gòu)買(mǎi)商品需多支出40萬(wàn)元,報(bào)告期商品銷(xiāo)售額為200萬(wàn)元,則價(jià)格指數(shù)為()
什么是季節(jié)變動(dòng)?研究它的意義何在?如何測(cè)定季節(jié)變動(dòng)?