Post Hoc Power Analysis Calculator
Expert Guide to Post Hoc Power Analysis
Introduction & Importance
Post hoc power analysis is a statistical method used to determine the power of a test after the data has been collected…
How to Use This Calculator
- Enter the significance level (α), power (1 – β), and effect size (d).
- Click ‘Calculate’.
- View the results and chart below.
Formula & Methodology
The formula for post hoc power analysis is based on the non-central t-distribution…
Real-World Examples
| Scenario | α | Power | d | Sample Size |
|---|---|---|---|---|
| Example 1 | 0.05 | 0.8 | 0.5 | 64 |
Data & Statistics
| Statistic | Value |
|---|---|
| Mean Sample Size | 60.5 |
Expert Tips
- Always use the correct effect size for your test.
- Consider using a power analysis before collecting data.
Interactive FAQ
What is the difference between a priori and post hoc power analysis?
…