quiz04.sp01

quiz04.sp01 - Test 4 St 512 Spring 2001 Dickey Question 1....

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Sheet1 Page 1 Test 4 St 512 Spring 2001 Dickey Question 1. I have factors A(5 levels), B(3 levels), and C(2 levels), all fixed effect factors. I use these in a 5x3x2 factorial experiment replicated in 4 blocks. My error mean square is MSE=60. _ As usual I write Y1. .. for the average of all observations _ having A at level 1, Y.12. for the average of all observations with B at level 1 and C at level 2 etc. (a) (18 pts.) Compute the degrees of freedom for A _____ and for the AB interaction ____. Compute the error degrees of freedom _________. (b) (27 pts.) Compute the standard errors for: _ _ (i) The difference of two A means like Y2. .. - Y1. .. Standard error =_____ _ _ _ (ii) The contrast 2 Y31. . - Y21. . - Y11. . Standard error = ______ (iii) The comparison of level 1 of B to level 2 of B when C is held at level 1 (averaged over the levels of A and the reps. Standard error = ________ _ _ (c) (24 pts.) I computed Y2. ..-Y1. .. = 3 as an estimate of alpha_2-alpha_1 where, as usual, alpha_1 and alpha_2
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This note was uploaded on 08/01/2008 for the course ST 512 taught by Professor Dickey during the Summer '07 term at N.C. State.

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quiz04.sp01 - Test 4 St 512 Spring 2001 Dickey Question 1....

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