power-sample-size-calculator

# Power and Sample Size Calculator ## Purpose Provides statistical power analysis and sample size determination capabilities for experimental design. ## Capabilities - Power analysis for common tests (t-test, ANOVA, chi-square) - Effect size calculation - Sample size estimation - Simulation-based power analysis - Multi-level model power analysis - Sequential analysis design ## Usage Guidelines 1. **Effect Size**: Specify meaningful effect sizes 2. **Power Target**: Set appropriate power levels (typically 0.80) 3. **Type I Error**: Control alpha appropriately 4. **Simulation**: Use simulation for complex designs ## Tools/Libraries - G*Power - pwr (R) - statsmodels