Pre Post Study Design Sample Size Calculator. Similarly the sample size. Interpret carefully.
The study is about GBV during pregnancy. The estimated probability is a function of sample size variability level of significance and the difference between the null and alternative hypotheses. Feasible sample size 4.
Components of Power Calculations Outcome of interest.
ES Mean post - Mean pre SD diff where SD diff is the standard deviation of the paired differences. Expected effect size 3. Measurements are taken at two pre-determined time intervals. In conjunction with careful sample size calculation using method 1 or 2.
