# HW9 - Answers - HP340 Biostatistics Fall 2009 DUE April 1...

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HP340: Biostatistics, Fall 2009 Name:________________________ DUE: April 1 Homework #7 1. Factorial designs are research designs in which _______ independent variable(s) is/are simultaneously varied. a. at least three b. two or more c. one or more d. one e. none of the above 2. The simplest factorial design is a _______ design. a. 1 x 1 b. 1 x 2 c. 2 x 1 d. 2 x 2 e. 3 x 2 3. In a 2 x 2 factorial design, there will be a total of _______ cell mean(s) for the analysis of variance. a. two b. three c. four d. five e. six 4. An interaction in a factorial design is defined as ______. a. a situation in which the effect of one independent variable depends upon the level of the other independent variable b. the difference between main effect means for factors A and B c. the sum of main effect means for factors A and B d. the effect of one independent variable average across levels of the other independent variable e. the main effect squared 5. If SS Total = 500, SS A = 150, SS B = 50, and SS Error

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HW9 - Answers - HP340 Biostatistics Fall 2009 DUE April 1...

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