POWER Procedure

The new LOGISTIC statement performs power and sample size analyses for the likelihood ratio chi-square test of a single predictor in binary logistic regression, possibly in the presence of one or more covariates (where all predictors are independent of each other). The new TWOSAMPLEWILCOXON statement performs power and sample size analyses for the Wilcoxon-Mann-Whitney test for two independent groups. The ONESAMPLEFREQ statement now covers equivalence, noninferiority, and confidence interval precision for a proportion. The PAIREDFREQ statement offers new input parameterizations, including raw proportions and correlation.