A.大中取大準(zhǔn)則
B.小中取大準(zhǔn)則
C.渴望水平準(zhǔn)則
D.期望損益準(zhǔn)則
E.最大可能準(zhǔn)則
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A.客觀環(huán)境的可能狀態(tài)集
B.決策者的可行行動集
C.決策行動的收益函數(shù)
D.決策樹
E.決策者
A.環(huán)比法
B.定基法
C.方程法
D.算術(shù)平均法
E.幾何平均法
A.指數(shù)曲線趨勢模型
B.修正指數(shù)曲線趨勢模型
C.邏輯曲線趨勢模型
D.龔配茨曲線趨勢模型
E.雙指數(shù)曲線趨勢模型
A.R2=SSR/SST
B.R2=SSE/SST
C.R2=1-SSR/SST
D.R2=1-SSE/SST
E.R2=1-SSR/(SSR+SSE)
在y對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y的觀測誤差
C.對x的觀測誤差
D.x的高次項對y的影響
E.模型參數(shù)估計的錯誤
最新試題
變量數(shù)列中，各組頻率之和應(yīng)（）
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？（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
If the individual class frequency is divided by the total frequency, the result is the （）.
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 （）.
最能反映離散程度的指標(biāo)是（）
Descriptive statistics deals with methods of（）
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？（）
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）