Minimum Detectable Effect Calculator
Estimate the smallest conversion-rate lift an A/B test plan can reliably detect.
Minimum detectable effect
Enter values
Uses total sample size and visible split.
| Metric | Value |
|---|
Solve d where power(pA, pB, nA, nB, alpha) equals requested power
How?
How this is calculated
This calculator solves the two-independent-proportions z-test power equation. It uses pooled variance under the null, non-pooled variance under the alternative, and the visible traffic split to derive A and B sample sizes.
Formula: Solve d where power(pA, pB, nA, nB, alpha) equals requested power
Sources
- statsmodels power_proportions_2indep. statsmodels. Retrieved .
- statsmodels samplesize_proportions_2indep_onetail. statsmodels. Retrieved .
Method last reviewed