Mediation Power Analysis Calculator
Introduction & Importance
Mediation power analysis is a crucial step in determining the sample size required for a mediation analysis…
How to Use This Calculator
- Enter the sample size (n) in the provided field.
- Enter the proportions (p1 and p2) for the control and treatment groups, respectively.
- Click the “Calculate” button.
Formula & Methodology
The mediation power analysis is based on the formula for the power of a two-proportion z-test…
Real-World Examples
Example 1
Suppose we have a sample size of 100, with a proportion of 0.2 in the control group and 0.4 in the treatment group…
Data & Statistics
| Sample Size (n) | Proportion in Control Group (p1) | Proportion in Treatment Group (p2) | Power |
|---|---|---|---|
| 50 | 0.2 | 0.4 | 0.804 |
| 100 | 0.2 | 0.4 | 0.969 |
Expert Tips
- Always ensure your sample size is large enough to detect a meaningful effect.
- Consider using a power of at least 0.8 for your analysis.
Interactive FAQ
What is mediation power analysis?
Mediation power analysis is a statistical method used to determine the sample size required for a mediation analysis…
CDC’s Sample Size Calculator and UNC’s Two Proportion Z-Test are excellent resources for further learning.