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