Test Monitoring
Sequential Sampling Calculator
Monitor your A/B test in real-time using sequential testing methodology. Make informed decisions about stopping tests early while controlling error rates.
Current Test Data
Variation A (Control)
Variation B (Treatment)
Typically 0.05 (5%)
How It Works
Sequential sampling allows you to check test results multiple times during the experiment without inflating error rates. It uses adjusted thresholds that account for repeated testing, providing valid statistical inference even when monitoring continuously.
This method is more efficient than fixed-sample testing because you can stop as soon as a clear winner emerges, saving time and traffic while maintaining statistical validity.
Interpretation Guide
- •Continue Testing: Not enough evidence yet to declare a winner
- •Clear Winner: Strong evidence that one variation outperforms the other
- •Conservative Thresholds: Adjusted to account for multiple testing and control false positives