This system runs controlled experiments to test whether a change — like a different button color — actually improves results. It uses statistics to tell you whether the difference is real or just random chance.
We tested two versions of a checkout button on an e-commerce site across 10,000 users over 14 days. Half the users saw the green button, half saw the orange button. We measured which one got more people to complete their purchase.
5,000 users saw the green button. 5,000 saw the orange button. The split was completely random so neither group had an unfair advantage.
We applied a z-test — a mathematical formula that calculates the probability that the difference between the two groups happened by random chance. If that probability is below 5%, the result is considered statistically significant.
The p-value came back at 0.000007 — meaning there is only a 0.0007% chance this result was random. The orange button genuinely converts better. Recommendation: launch it.