Prior to the steps below, enter the data as appropriate for the analyses (described elsewhere). As always, the following commands should be typed directly in the R console window.
Get the mean and standard deviation of the dependent variable for each of the levels.
(Outcome~Factor) |> describeMoments()
Get the analysis of variance source table.
(Outcome~Factor) |> describeEffect()
Test the main effect for statistical significance.
(Outcome~Factor) |> testEffect()
Get the proportion of variance accounted for by the main effect.
(Outcome~Factor) |> estimateEffect()