Class notes two way anova
7 important questions on Class notes two way anova
What is the difference between a one way anova, and a two way anova?
- With a one way anova you manipulate one independent variable with more than two levels and have a continuous dependent variable.
- with a two way anova you manipulate two independent variables, and have a continuous dependent variable
What is useful about a factorial design?
- You can see how variables interact.
- you can show moderations
With a two way anova, to which factors can the variance explained by manipulations be attributed?
- Effects of the first independent variable
- effects of the second independent variable
- effect of interaction between both independent variables
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If you're doing a two way anova in spss, how many f's are you gonna get, and what do they stand for?
- 3 f's
- one f for the effect of one independent variable on the dependent variable
- one f for the effect of another independent variable on the dependent variable
- one f for the interaction of both independent variables on the dependent variables
How is the F calculated?
- Mean squared variance of the effect/mean squared error
Why are main effects in a two way anova not that interesting?
When reporting a main effect, which df's do you report with your F?
- Of the independent variable
- of the error.
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