June 4, 2013
We are pleased to announce the release of the %FactorialPowerPlan SAS macro for planning a factorial or fractional factorial experiment. The calculations can be done for either posttest-only or pretest-posttest designs. Participants can either be assumed to be independent, or nested within existing clusters as discussed in Dziak, Nahum-Shani, and Collins (2012).
The macro can be used to calculate
- statistical power based on an available sample size and assumed effect size,
- required sample size based on a desired statistical power and an assumed effect size, or
- minimum detectable effect size based on available sample size and desired statistical power.