IOE366W13-Exam2-practice-sol

Increase b decrease c remain the same d increase by

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Unformatted text preview: . increase B. decrease C. remain the same D. increase by 20 E. decrease by 10 Answer: A ̅ is increased by 20 while ̅ is only increased by , leading to increased MSTr (i.e., enlarged “between-samples” variation). At the same time, MSE remains the same. As a result, increases. (cf. p. 394-395) ˆ 4. For a multiple regression model, ( yi y )2 250 and ( yi yi )2 60 , what is the proportion of the total variation in the observed yi ‟s that is explained by the regression model is A. B. C. D. E. 0.76 0.24 0.31 0.19 0.52 ANSWER: A 1 of 7 IOE 366 Fall 2012 Practice 5. In the two-factor ANOVA model with interaction, assume that there are 3 levels of factor A, 2 levels of factor B, and 3 observations for each of the six combinations of levels of the two factors. Then the critical value for testing the null hypothesis of no interaction between the levels of the two factors at t...
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