Model diagnostics for ANOVA

[Planeshifter]

For the ANOVA test, it would be useful to add a way to retrieve model diagnostics (residual plot, QQ normality plot of residuals).

[gweinberg]

how about also automatically checking the group st devs, and if the ratio is large (R says greater than 10), printing some warnings when conducting an ANOVA;
maybe also automatically checking for severe outliers and printing some warning notifications when conducting an ANOVA;
maybe also if the group sizes are very unbalanced.