2-Way ANOVA Flashcards
Why do we use a 2-way ANOVA?
Compares means of dependent variables between groups constructed from 2 independent variables
What are the assumptions?
Samples come from a normal population (box plot), Equal population variance (IQR, Levene’s test), Means plots (interaction or no interaction)
If there is no interaction, do we use main or simple effects?
Main
If there is interaction, do we use main or simple effects?
Simple
Hypotheses for 2 Way ANOVA?
H0: _____ (independent variable), and ________ (independent variable) do not interact to affect mean _____ (dependent variable).
Ha: ______ and ______ interact to affect mean _______
What values do we report in a 2 way ANOVA?
Test statistic (F), p-value
Conclusion for 2 way ANOVA?
There is/isn’t sufficient evidence to support that ___ and ___ affect the mean ______. We reject/fail to reject H0.