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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Hi I know that you can’t answer all questions. Can you just answer question 23 please.

Transcribed Image Text:Answer: 20. To test the ANOVA null hypothesis Ho: A-4:- 2- 4,, what are the test statistic and its associated P-value? F(3, 50) = 3.28; 0.01 <P<0.025 F(3, 50) = 2.91; 0.02 <P<0.05 A) B) C) F(4, 49) = 3.28; 0.01 <P<0.025 D) F(3, 50) = 3.28; 0.025 <P<0.05 E) F(4, 50) = 2.91; 0.025 <P< 0.05 Answer: Bonus Points 21. What conclusion might you reach based on these analyses? A) There is no evidence to suggest that the null hypothesis should be rejected. B) There is evidence to support the conclusion that all the population means are different. C) There is sufficient evidence to conclude that the sample means are not equal. There is sufficient evidence to conclude that not all the population means are equal. It would be dangerous to conclude anything because the sample sizes are small and some of the ANOVA assumptions are not satisfied. D) E) Answer: Because one of the brands of MP3 players (Brand B) is known to be the most popular among customers, it was decided before the data were gathered to compare this brand against the other three to see if it had a longer battery life. What would be appropriate null and alternative hypotheses to establish to do 22. such a test? A) Ha: H, > (4, -Hc = Hp) В) Ho: 3, + Hc + H) = µ, Но: 3 (H, + He + Hp) < H, На: 3 Ho: 4.-H - µc - Hp C) Ha: Ha> Hi H > Hei H > Hp 1 (H, + Hc + Hp) -", Но: 4 3 D) 4 3 (u, +H + H,) < На: 4 Ho: all of the means are equal. E) Ha: all the other means are different from ". Answer: 23. Let contrast y = 3µB - HA - Hc - Hp. What is the sample contrast C i.e. the estimate of the contrast w? A) -22.03 C) 6.31 11.67 B) Answer: -16.85 D) 24. What is SE, i.e. the value of the standard eror of the contrast y ? A) 3.01 C) 9.05 B) 2.74 D) 0.92 Answer: 25. What is a 95% confidence interval for the contrast y ? A) (-13.619, 26.239) B) (0.263, 12.357) C) (0.805, 11.814) D) (5.623, 17.717)

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