問(wèn)答題

某商場(chǎng)準(zhǔn)備在商場(chǎng)內(nèi)安裝充電式應(yīng)急照明燈,通過(guò)招標(biāo)收到3家照明燈生產(chǎn)商的投標(biāo)。該商場(chǎng)從3家生產(chǎn)商提供的應(yīng)急照明燈樣品中各隨機(jī)抽取了5個(gè)進(jìn)行檢驗(yàn),測(cè)得各個(gè)樣品充電后可持續(xù)照明的時(shí)間長(zhǎng)度(小時(shí))數(shù)據(jù)如下:

完成下面的方差分析表:


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一家電器銷售公司的管理人員認(rèn)為,每月的銷售額是廣告費(fèi)用的函數(shù),并想通過(guò)廣告費(fèi)用對(duì)月銷售額作出估計(jì)。用電視廣告費(fèi)用作自變量,銷售額作因變量進(jìn)行回歸分析。下表給出了相關(guān)的分析結(jié)果,

下列說(shuō)法正確的是()

A.廣告費(fèi)用每增加$1,000, 銷售額增加$1.420 211
B.廣告費(fèi)用每增加$1,000, 銷售額增加$1420. 211
C.廣告費(fèi)用每增加$1420.211, 銷售額增加$1000
D.廣告費(fèi)用每增加$1, 銷售額增加$363.689 1

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