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anova, 3 2 main, 1 interaction , 7 3 main, 3 two-way, 1 three-way interaction, between group, t test, 1 between groups, compares teh average variablity between group means with the average varaiblity of scores within groups, 2, test the null hypothesis, random error, testing for effect sizes , 3,2,2 , 3,3,4,2 , anova, 3, unsystematic group differences (random error, residual term, unexplained variablity), within group, 2x2 factorial (4 means), two group (2 means), 2, differences between group means is due solely to random erroer, the appropriate anova , 0% of variablityy is explained by treatment, what is the strenght of the effect (effect size or variance explained) , factorial anova, this is equivalent to the eta^2 value for this effect , purpose, what is analysis of covariance (ancova) ? , the residual effects that are left over after other effects contributing to teh group means have been removed, 2, how do i select the best method for analyzing the pretest-postest design? , types of variablity, 3x2x2 factorial (12 means) , about testing for variability , 15 4 main, 6 two-way, 4 three-way, 1 four way interaction, rosnow & rosenthal (1989a, 1995) , f test, 1, eta^2, quantitative ineraction , what is the exact nature of the interaction in terms of both its empirical understanding and theoretical significance, multigroup (3 means) , 3x3x4x2 factorial (72 menas), divide the total sum of squares into the sum of squres resulting f from teh interaction , steps, qualitative interaction , 4, systematic treatment effects, nonzero interaction effect in a classification plot, when graphed, is that the lines are not parallel., one-way anova , consult anova t table, when should i use manova? , assess the statistical sig. of the relationship between categorical indepedent variables and a single contionous variable, 3 , does an interaction effect actually exist in the population? , anova stuff that needs to be evaluated and added to above diagram , 100% of variablityy is e explained by treatment, factorial anova, interactions, factorial anova