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anova()
The anova() function will compute an analysis of variance (ANOVA) for a model, and present the statistics in an ANOVA table, that includes: - sums of squares (Sum Sq) - degrees of freedom (Df) - mean squares (Mean Sq) - F values - p-values (Pr(>F)) ...
supernova()
The supernova() function will compute an analysis of variance (ANOVA) for a model, and present the statistics in a modified ANOVA table, that includes: - sums of squares (SS) - degrees of freedom (df) - mean squares (MS) - proportional reduction in ...
proportion reduction in error (PRE)
Proportion reduction in error (PRE) is the proportion of error that has been reduced by a more complex model compared with a simpler model, which in our course is always the empty model. When comparing to the empty model, PRE is calculated as SS ...