== FAQs for analysis of variance == 1. [:FAQ/Sattherthwaite:Why are the degrees of freedom not whole numbers?] 1. [:FAQ/E:What does a number containing an 'E' signify?] 1. [:FAQ/SumsOfSquaresTypes:In ANOVA and Regression, what do the various different types of Sums of Squares mean, and does the choice matter?] 1. [:FAQ/Rss:Sums of squares used by R in lm, lmer and aov] 1. [:FAQ/wmeans:A note about unequal group sizes in ANOVA] 1. [:FAQ/FVars: What is the variance of the mean of my transformed data?] 1. [:FAQ/VarMSE: What is the value of the error variance for raw data using that of its scalar transformed data?] 1. [:FAQ/rmform: How do I format data for input into a repeated measures analysis in SPSS?] 1. [:FAQ/glmrm: How do I perform a repeated measures analysis of variance in SPSS?] 1. [:FAQ/bwss: What is the effect of dropping a between by within subjects interaction on other terms in a mixed anova?] 1. [:FAQ/Interaction:How do I work out the meaning of a significant interaction?] 1. [:FAQ/ancreg:Can I do an analysis of covariance using a regression?] 1. [:FAQ/constantcov:Inappropriate use of a constant covariate in repeated measures ANCOVA] 1. [:FAQ/Manova:How do I adjust for varying covariates in a repeated measures ANOVA in SPSS?] 1. [:FAQ/WsubEffects: What is the difference between within subjects effects and within subjects contrasts in SPSS?] 1. [:FAQ/Auc: What summary measures can I use to describe repeated measures?] 1. [:FAQ/Tukey: How do I interpret subsets in Tukey's HSD output?] 1. [:FAQ/TukeyKramer: How do I compare all pairwise comparisons in a between subjects anova (and in a repeated measures anova)?] 1. [:FAQ/SimpleMainEffects:Why won't SPSS let me do post hoc tests involving a within-subjects factor?] 1. [:FAQ/SimpleEffs:How do I do a simple effects analysis in SPSS?] 1. [:FAQ/pvs:How do I adjust p-values for number of comparisons using SPSS?] 1. [:FAQ/SpssBonferroni:Adjusted p-values] 1. [:FAQ/RepeatedMeasuer:Repeated measures, Mixed models and Split-plot designs: A Rant] 1. [:FAQ/ResidsRepMeas:How do I check Normality assumptions in repeated measures analyses in SPSS?] 1. [:FAQ/orthopolys:Fitting linear orthogonal polynomials] 1. [:FAQ/lincon:How do I compare group means in a non-standard post-hoc contrast?] 1. [:FAQ/ss:Formulae for interaction sums of squares in balanced designs]