Finally, we will use JMP and G*Power (a free software download) to practice obtaining required sample sizes based on different effect sizes and desired levels of power. Becoming comfortable with ...

Finally, we will use G*Power (a free software download) to practice obtaining required sample sizes based on different effect sizes and desired levels of power. Becoming comfortable with sample size ...

We consider the problem of calculating power and sample size for tests based on generalized estimating equations (GEE), that arise in studies involving clustered or correlated data (e.g., longitudinal ...

We derive an explicit form for power/sample size calculation based on these two tests. A number of simulation studies have been used to illustrate the efficiency of the tests for the case-cohort ...