Question

1. How many F ratios must be computed for an analysis of variance of a 2x4 factorial design?

2. Imagine that you are conducting a one-way ANOVA with three groups, N=100 in each. Under which of these conditions would you have the least statistical power?

• A. True R2 = .05
• B. True R2 = .10
• C. True R2 = .01

3. The Solomon 4-Group Design is especially useful for identifying ____________________.

• A. pre-test effects
• B. effects of experimenter bias
• C. interaction effects
• D. null effects

4. You conduct an experiment looking at the effects of depression (2 levels), gender (2 levels), and ethnicity (5 levels) on college grades (5 levels). What kind of factorial research design would this involve?

• A. three-way

• B. twenty-way

• C. four-way

• D. 2x2x2

5. In most factorial studies, the primary focus is on

A. the interaction effects of the independent variables on the dependent variables.

• B. the main effects of the dependent variables on the independent variables.

• C. the main effects of the independent variables on the dependent variables.

• D. the interaction effects of the dependent variables on the independent variables.

Answer 1

1.  8 F-ratios must be computed for an analysis of variance of a 2x4 factorial design.

because 2X4 means one is 2 levels and other is 4 levels, so there are 8 different condition.

2. Mostly used is 0.05

3. The Solomon 4-Group Design is especially useful for identifying pre-test effects.

4. An experiment looking at the effects of depression (2 levels), gender (2 levels), and ethnicity (5 levels) on college grades (5 levels) four way.

5. In most factorial studies, the primary focus is on the main effects of the independent variables on the dependent variables.