Fit your model, and before you look at the results, extract the residuals and put them in the QuantilePlot
function. If it is roughly a straight line, then they are sufficiently Normally distributed.
Note that as the previous poster implied, an ANOVA is also a linear model and you can fit it using LinearModelFit
using the NominalVariables
option to indicate your categorical predictor(s). The Analysis of Variance package just gives you a few extra options. But the nice thing about LinearModelFit
is that you can mix quantitative and categorical predictors (an ANCOVA).