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 mean difference and its confidence interval. Though the confidence interval defaults to 95%, it can be changed if desired.
(Outcome~Factor) |> estimateDifference()
(Outcome~Factor) |> estimateDifference(conf.level = .99)
Test the mean difference for statistical significance.
(Outcome~Factor) |> testDifference()
Get the standardized effect size for the mean difference.
(Outcome~Factor) |> standardizeDifference()