多項(xiàng)選擇題可用來(lái)反映產(chǎn)業(yè)成長(zhǎng)過(guò)程的S形生長(zhǎng)曲線模型有()

A.指數(shù)曲線趨勢(shì)模型
B.修正指數(shù)曲線趨勢(shì)模型
C.邏輯曲線趨勢(shì)模型
D.龔配茨曲線趨勢(shì)模型
E.雙指數(shù)曲線趨勢(shì)模型


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你可能感興趣的試題

1.多項(xiàng)選擇題線性回歸模型的判定系數(shù)R2可表示為()

A.R2=SSR/SST
B.R2=SSE/SST
C.R2=1-SSR/SST
D.R2=1-SSE/SST
E.R2=1-SSR/(SSR+SSE)

2.多項(xiàng)選擇題

在y對(duì)x是線性回歸模型中,隨機(jī)誤差u產(chǎn)生的原因有()

A.各種細(xì)小的偶然因素
B.對(duì)y的觀測(cè)誤差
C.對(duì)x的觀測(cè)誤差
D.x的高次項(xiàng)對(duì)y的影響
E.模型參數(shù)估計(jì)的錯(cuò)誤

3.多項(xiàng)選擇題根據(jù)線性回歸分析的基本假定,因變量的觀測(cè)值必須()

A.數(shù)學(xué)期望為0
B.具有相同的方差
C.服從正態(tài)分布
D.不同次觀測(cè)相互獨(dú)立
E.與自變量的取值相互獨(dú)立

5.多項(xiàng)選擇題在方差分析的數(shù)據(jù)結(jié)構(gòu)模型中,需假設(shè)隨機(jī)誤差ε()

A.數(shù)學(xué)期望為0
B.相互獨(dú)立
C.方差為常數(shù)
D.方差隨因子水平的增減而增減
E.服從正態(tài)分布

最新試題

One advantage of a stem and leaf plot over a frequency distribution is that ().

題型:?jiǎn)雾?xiàng)選擇題

The number of class intervals in a frequency distribution is usually between ().

題型:?jiǎn)雾?xiàng)選擇題

某廠某年職工勞動(dòng)生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()

題型:?jiǎn)雾?xiàng)選擇題

品合格率指標(biāo)是()

題型:?jiǎn)雾?xiàng)選擇題

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()

題型:多項(xiàng)選擇題

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()

題型:?jiǎn)雾?xiàng)選擇題

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?()

題型:?jiǎn)雾?xiàng)選擇題

Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ().

題型:?jiǎn)雾?xiàng)選擇題

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 ().

題型:?jiǎn)雾?xiàng)選擇題

要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()

題型:多項(xiàng)選擇題