PSYCH 100A Lecture Notes - Lecture 22: Null Hypothesis, Analysis Of Variance
Document Summary
Be able to create and fill out a source table for all types of anovas. If the lines cross or the move in opposite directions, qualitative interaction. Know how to interpret interaction and main effects from a two way graph. Won"t have to know how to do from scratch, some numbers will be given. Know degrees of freedom and what goes in the table. Under the null hypothesis, all groups are just samples from one large population. Effect of gender on medication for depression. 3 levels of medication: low, medium, high dose. 2 participants in each group, 6 groups, so 12 total participants. Df interaction = df iv1 x df iv2. Df residual = sum df for each cell/condition. 2 participants for each cell, df for each condition = 2 - 1 = 1. 6 total conditions, 3 for men, 3 for women. F iv1 = ms iv 1 / ms residual.
