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Unformatted text preview: Name: __________________________________________ 16 December 2008 IE330 Fall 2008 Final Exam #1 Part 1: Mandatory No calculators, closed book, closed notes. Do not tear off any pages. 1 of 30 Name: __________________________________________ 1. CHAPTER 14  True/False questions (3 points each, 9 points total) a. (TRUE or FALSE) When shown the interactions plot for a multifactor ANOVA, at least one line having a nonzero slope (i.e. not horizontal) indicates an interaction effect. b. (TRUE or FALSE) A fractional factorial design differs from a full factorial design in that at least one of the main effects is not investigated. c. (TRUE or FALSE) In a twoway ANOVA, it is possible for both main effects pvalues to be high (> 0.05) even if the overall ANOVA pvalue is low (< 0.05). d. (TRUE or FALSE) Two lines crossing on an interactions plot for a multiplefactor ANOVA is an indication of an interaction effect. e. (TRUE or FALSE) A fractional factorial design differs from a full factorial design in that at least one of the interaction effects is not investigated. f. (TRUE or FALSE) In a twoway ANOVA, if at least one of the main effects pvalues is low (< 0.05), then the ANOVA is considered significant. 2. CHAPTER 14  Multiple choice questions (3 points each, 9 points total) a. Choose the best description of a 2 51 experiment: i. It is an experiment with 2 factors, one main effect is not tested ii. It is an experiment with 2 factors, one interaction effect is not tested iii. It is an experiment with 4 factors, one main effect is not tested iv. It is an experiment with 4 factors, one interaction effect is not tested v. It is an experiment with 5 factors, one main effect is not tested vi. It is an experiment with 5 factors, one interaction effect is not tested b. Which of the following models is a proper model formulation for a full factorial ANOVA? i. ijk i j ijk Y μ τ β ε = + + + ii. ( 29 ( 29 ijk i j ijk i j Y μ τ β τβ τβ ε = + + + + + iii. ( 29 ijk i j ijk ij Y μ τ β τβ ε = + + + + iv. ( 29 ijk i j ijk ijk Y μ τ β τβ ε = + + + + 2 of 30 Name: __________________________________________ v. None of the above c. Which of the following describes a random factor? i. When each level of factor A is randomly chosen from a population of possible levels of factor A. ii. When each level of factor A is randomly assigned to the levels of factor B to compose the treatment combinations. iii. When the levels of factor A are randomly assigned to the experimental trials to ensure that error is randomly distributed across the treatment combinations iv. None of the above are correct. 3. CHAPTER 15  True/False questions (3 points each, 9 points total) a. ( TRUE or FALSE) If, when examining the results of a singlefactor ANOVA, you find that the population is not normally distributed and you cannot transform the data to make it normal, then a KruskalWallis test can be used instead....
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This note was uploaded on 01/22/2012 for the course IE 370 taught by Professor Chunghorng,r during the Spring '08 term at Purdue.
 Spring '08
 Chunghorng,R

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