1.I have a research study on depression treatment.Predictor A is therapy,with cognitive behavioral therapy,behavior therapy, and medication as the three levels.Predictor B is exercise, with intense exercise,intermediate exercise, and no exercise as the three levels.How many different groups are in this study?

a.4

b.3

c.9

d.6

2.I have a research study on depression treatment.Predictor A is therapy,with cognitive behavioral therapy,behavior therapy, and medication as the three levels.Predictor B is exercise, with intense exercise,intermediate exercise, and no exercise as the three levels.What is the df for factor A?

a.2

b.9

c.5

d.3

3.I have a significant F value for my A*B interaction.

My SStotal for this study is 100, my SSA is 20, my SSbis 30 and my SSA*B is 10.

What is eta squared for the A*B interaction?

a..20

b.there is not enough information to answer this question.

c..50

d..10

4.The Sum of Squares for the interaction term A*B equals

SSbetween groups - SSA - SSB

you multiply the sum of squares for A times the sum of squares for B

SSA-SSB

none of the answers are correct

5.In factorial design, the denominator of the F test

is within groups variation

is between persons variation

is variation due to the A*B interaction

none of the above

6.A researcher is examining the influence of type of major(psychology,engineering,and music)and class level (Junior,Senior)on reported stress.There are 10students in each group.

SSbg= 70

SSA (major)= 20

SSB (class) = 30

SSA*B (class*major)= ?

SSwg= 140

What is the F value for the A*B interaction?

a.10

b.there is not enough information to tell

c.2.59

d.3.86

7.In factorial design

a.You are limited to 3main effect predictors and their interactions

b.there is theoretically no limit on the number of predictors and interactions you can have

c.You are limited to 5main effect predictors and their interactions

d.none of the answers are correct.