[問題] 北科工管統計

看板Grad-ProbAsk作者 ( )時間16年前 (2009/03/27 01:23), 編輯推噓1(103)
留言4則, 2人參與, 最新討論串1/1
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? ---- 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? -- 求求哪位好心大大能夠幫幫小人的無知,拜託拜託了<(_ _)> -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.167.159.61 ※ 編輯: kcl32 來自: 118.167.159.61 (03/27 01:24)

03/27 11:34, , 1F
96.9這題好耗時間阿 整大題15分0rz
03/27 11:34, 1F

03/27 13:47, , 2F
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, 2F

03/27 13:48, , 3F
可節省很多時間 前提(能用計算機)
03/27 13:48, 3F

03/27 17:22, , 4F
是不難阿 只是按計算機也很累 n=16 y也要算0rz
03/27 17:22, 4F
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