作者kcl32 ( )
看板Grad-ProbAsk
標題[問題] 北科統計
時間Fri Mar 27 01:23:28 2009
89北科工管統計No.4
Suppose an airplane has more than half of engines in operation
can fly safety.
There are two test planes(2 engine plane and 4 engine plane each).
We know these two airplanes use same engines and the probability
of safety flying of each airplane is equal.
What is the probability in operation?
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96北科工管統計No.9
An experiment is conducted to study the effects of three factors
and their interactions.
Two levels of each factor are used and two experimental runs
are made for each treatment.
The design and results are follows:
Resoponse Y X1 X2 X3
4.65 5.81 -1 -1 -1
21.42 21.35 1 -1 -1
12.66 12.56 -1 1 -1
18.27 16.62 -1 -1 1
7.93 7.88 1 1 -1
13.18 12.87 1 -1 1
6.51 6.26 -1 1 1
18.23 17.83 1 1 1
(1)What is the mean square of factor x1?
(2)What is R^2?
(3)Using the coded variables, estimate the multiple linear regression equation
y=B0+B1X1+B2X2+B3X3.What is the estimator B2?
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求求哪位好心大大能夠幫幫小人的無知，拜託拜託了<(_ _)>
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◆ From: 118.167.159.61
※ 編輯: kcl32 來自: 118.167.159.61 (03/27 01:24)
1F：推 chhayu:96.9這題好耗時間阿 整大題15分0rz 03/27 11:34
2F：→ s911125:其實題目不難 x1 x2 x3 加起來都是0 所以計算的時候 03/27 13:47
3F：→ s911125:可節省很多時間 前提(能用計算機) 03/27 13:48
4F：→ chhayu:是不難阿 只是按計算機也很累 n=16 y也要算0rz 03/27 17:22