🔥 Tier 1 - Must KnowID: statisticalSignificanceTesting
Statistical Significance in Testing (95% Confidence)
Probability that a test result is real and not caused by random chance (typically set at 95% / $p < 0.05$)
In Simple Words (Zero Jargon):
A mathematical calculation proving there is a 95%+ guarantee that your new page is actually better, and not just lucky.
Why It Is Critical
Without statistical significance, calling an A/B test winner is just guessing. Distrust early "significant" results on small sample sizes (a handful of orders on each side can cross thresholds purely by random fluctuation).
What You Get: Protection from rolling out fake winning changes that quietly destroy conversion rates over time.