統計計算~拜託高手幫忙解答~贈20點－dkdqgav的部落格

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統計計算~拜託高手幫忙解答~贈20點

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A nationwide retailer wants to test whether new product shelf facings are effective in increasing sales volume. New shelf facings for the soft drink country Time are tested at a random sample of 15 stores throughout the country. Data on total sales of Country Times for each store, for the week before and the week... 顯示更多 A nationwide retailer wants to test whether new product shelf facings are effective in increasing sales volume. New shelf facings for the soft drink country Time are tested at a random sample of 15 stores throughout the country. Data on total sales of Country Times for each store, for the week before and the week after the new facings are installed, are giving below: 一個全國性販商想要測試新產品架子飾面是否是有效的在增長的銷售量。新的架子飾面為軟性飲料的國家時間被測試在15家商店隨意抽樣在國家中。關於國家時間全面銷售的數據為每家商店，為星期，在和星期之前，在安裝之後新的飾面，如下給： Store:123456789101112131415 After:60542035217016579109032197729 Before:5761123812695398899226147022 Using the 0.05 level of significance, do you believe that the new shelf facings increase sales of Country Time? 使用0.05顯著水準，您是否相信新的架子飾面增加國家時間銷售？更新: sorry,我沒把題目data打清楚 store: 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 arter:60,54,20,35,21,70,1,65,79,10,90,32,19,77,29 befor:57,61,12,38,12,69,5,39,88,9,92,26,14,70,22 更新 2: 以上兩位高手~我收到了~真ㄉ非常謝謝你們為我解答!!

最佳解答:

After:60542035217016579109032197729 Before:5761123812695398899226147022 可以用個, 分一下嗎~ 2006-07-29 10:47:46 補充：這個題目是：成對樣本之二個母體平均數差的統計推論因為他有安裝前後，像有的題目有實施前、後或吃這個藥前、後，這類的題目都是用這種算法除了，要算這”二組資料是獨立”的之外，就不是我以下的算法 2006-07-29 11:15:36 補充： arter:60,54,20,35,21,70,1,65,79,10,90,32,19,77,29 befor:57,61,12,38,12,69,5,39,88,9,92,26,14,70,22 b-a：-3,7,-8,3,-9,-1,4,-26,9,-1,2,-6,-5,-7,-7算b-a的平均(d)＝-3.2Sd=8.436令 Ud為星期前、後安裝新的飾面母體無效[一] Ho：Ud<=0 v.s. H1：Ud>0 2006-07-29 11:16:05 補充： [二] d-Ud -3.2 - 0 t= -------- = ---------------- = -1.469 Sd/√n 8.436/√15[三] (15-1) T 0.05 =1.761 棄卻域：{T | T>1.761} 2006-07-29 11:16:17 補充： [四]∵T=-1.469<1.761 故接受Ho，則星期前安裝新的飾面＜星期後安裝新的飾面是不相信新的架子飾面增加國家時間銷售希望有幫到你的忙 2006-07-29 11:22:17 補充： [二] d-Ud -3.2 - 0t= -------- = ---------------- = -1.469Sd/√n 8.436/√15

其他解答:

這題根本沒提到常態~~ 應該用無母數的 sign test或是 wilcoxon signed rank sum test|||||After:60,54,20,35,21,70,16,57,91,09,03,21,97,72,9 Before:57,61,12,38,12,69,53,98,89,92,26,14,70,22 這些數字是十位數一個嗎?! 那Before不就少一個?@@ 2006-07-29 11:12:48 補充： 1代表before 2代表after H0：μ1－μ2＝0 H1：μ1－μ2＜0 d的平均數＝(－48) / 15＝－3.2 d的標準差 S＝√[nΣd^2-(d的平均數)^2 / n(n-1) ] ＝√[ (15*1150-10.24) / 15*14 ] ＝√16090.44 ≒126.85 n=15<30用t 分布的左尾檢定 t=(－3.2－0) / (126.85 / √15) = －0.0977 α=0.05，df=15-1=14查表t =－1.761 因為－0.0977 > －1.761 所以接受H0 Ans：不相信新的架子飾面可增加國家時間銷售|||||這是統計計算題~需要計算過程~謝謝你的回答! 2006-07-29 09:25:47 補充： sorry,我沒把題目data打清楚 store: 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 arter:60,54,20,35,21,70,1,65,79,10,90,32,19,77,29 befor:57,61,12,38,12,69,5,39,88,9,92,26,14,70,22 2006-07-29 13:10:05 補充：以上兩位高手~我收到了~真ㄉ非常謝謝!!|||||相信,如果是不準的就要在更進一步調查清楚而且這種事本來就很難計算不準也沒有關係8758B59A7FA1EEA7