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)售量的變差中有多少是由于廣告費(fèi)用的變動(dòng)引起的?您可能感興趣的試卷
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最能反映離散程度的指標(biāo)是()
A cumulative frequency polygon is also called ().
對(duì)全國(guó)各鐵路交通樞紐的貨運(yùn)量、貨物種類(lèi)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()
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()
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().
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組,請(qǐng)指出哪項(xiàng)是正確的()
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?()