102關務抽樣 計算題參考答案 - 考試
By Blanche
at 2013-04-10T20:17
at 2013-04-10T20:17
Table of Contents
第四題(四)
如果題目沒有給樣本資料,就可單純用"文字"或數學式證明VAR比大小
去比較那一個估計式較好,但這題己經有給樣本資料了,最直接的方法
就去算VAR比大小,當你在想用文字去解釋時,直接下手算VAR時速度可
能還會比較快..
第五題..
這題的樣本資料,我一開始看到也當成2820....結果卻是28,20
實在是太#$@#$,所以題目一定要看清楚
樣本資料:M=320,N=20,n=5,M1<>M2<>M3.....,m1=m2=m3...m5=2
第一階段樣本序數 1 2 3 4 5
m: 2 2 2 2 2
每月伙食費 28,20 18,24 19,25 25,31 31,29
整理 48 42 44 56 60
計算:採二階段比例機率抽樣法
每月伙食費:(48/2+42/2+44/2+56/2+60/2)/5=125/5=25
VAR=15/5=3
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