A previous article discusses Cohen's d statistic and how to compute it in SAS. For a two-sample independent design, Cohen's d estimates the standardized mean difference (SMD). Because Cohen's d is a biased statistic, the previous article also computes Hedges' g, which is an unbiased estimate of the SMD. Lastly, the article discusses how to estimate the standard error of the statistic. Today's article extends the analysis by showing how to compute a confidence interval (CI) for Cohen's d (and ...
