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Unformatted text preview: 4 a. F test = 500/100=5 F critical =0.05, df =2, 12 = 3.89 Decision rule : reject if F > 3.89 Conclusion : reject the null: the means are not all equal. Which shelving policies are different? T = q (=0.05, df= 3, 12) * SQRT (MSE/nj) =3.77 * SQRT (100/5) = 16.85 b. The absolute difference between the group means: We have 3 comparisons: c(c1)/2 = 3*2 / 2 = 3 MIDDLE TOP = 10 MIDDLE BOTTOM = 20 TOP BOTTOM = 10 Only MIDDLE BOTTOM = 20 > 16.85 so the difference between these means sales are statistically different. 5. c. 6. b. 7. d. 8. c. 9. b. 10. c. 11. d....
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This note was uploaded on 03/30/2008 for the course STATISTICS 3001 taught by Professor Mcnertney during the Spring '08 term at TCU.
 Spring '08
 Mcnertney

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