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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 '05
 Nezami
 heart rate, eye contact

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