統計學 95關稅會統 - 考試
By Linda
at 2013-05-31T15:38
at 2013-05-31T15:38
Table of Contents
1. 某廠商關心其所做的廣告對其銷售量的影響。令x代表九週的廣告支出,y則代表
該期間的銷售金額。下列迴歸分析數據:
Σx =402 Σx^2 =11098 s=3.725 (應該是β1的估計標準誤) β1=1.7035
2) 檢定β1=1 之說法 (α=0.05)
3) 檢定β0+25β1=50之說法,竟解釋其意義 (α=0.05)
第三小題還真的不是很能理解它的意思
我是認為他要檢定 β0 = 25 ? β0 hat = 50-1.7035x25 = 7.4125 帶入 是這樣嗎?
2. (99關稅統計) 令X1,X2為同具以下質量密度函數 P(X|Θ)之獨立隨機變數,
其中Θ之真值可能為Θ0或Θ1:
X
1 2
P(X|Θ0) 0.5 0.5
P(X|Θ1) 0.3 0.7
(一) 求單筆觀測資料為X1時,Θ之MLE:
只求一筆資料為X1使 L(Θ)最大,應該是取P(X|Θ0)=0.5 (這裡說的X1應該是第一列吧?)
所以取最大的0.5所在 ΘMLE = Θ0
(二) 求在觀測資料X1和X2下,Θ之MLE:
這個我就沒有idea了
請求各位建議,謝謝!!
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