某汽車(chē)生產(chǎn)商欲了解廣告費(fèi)用X對(duì)銷(xiāo)售量Y的影響,收集了過(guò)去12年的有關(guān)數(shù)據(jù)。通過(guò)計(jì)算得到下面的有關(guān)結(jié)果:
銷(xiāo)售量與廣告費(fèi)用之間的相關(guān)系數(shù)是多少?您可能感興趣的試卷
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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)?
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()
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
If the individual class frequency is divided by the total frequency, the result is the ().
在組距數(shù)列中,下限就是()
Descriptive statistics deals with methods of()
One advantage of a stem and leaf plot over a frequency distribution is that ().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()
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?()