A/B proportion test
Compare two independent conversion rates with two-sided pooled z test.
Your numbers
B minus A
Samples must dey independent, with fixed observation period and expected cell counts wey large enough. Checking the result again and again before the end change error rates.
Compare scenarios
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Formula
z=(pB−pA)/√[p̂(1−p̂)(1/nA+1/nB)]
Compare two independent conversion rates with two-sided pooled z test.
Example wey show the calculation
- A conversions
- 100
- A visitors
- 1000
- B conversions
- 130
- B visitors
- 1000
- B minus A
- 3 percentage-point difference
- Two-sided p-value
- 0.0354884504665
- z statistic
- 2.10274060562
- Relative increase
- 30 %
Where e fit work and limits
Samples must dey independent, with fixed observation period and expected cell counts wey large enough. Checking the result again and again before the end change error rates.
We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.
Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.
Version of di formula: 10785dd5de02 · Example don get check: