Myth: your testing tool tells you when there's a winner
That green 'Significant!' badge feels like gospel. It's a sales feature.
Most tools flash significance the instant you cross the threshold — which, if you've been checking daily, is exactly the peeking problem that inflates false positives. The badge is built to make you feel decisive, not to be right.
Day 9, tool says winner, +6%. I checked the daily breakdown myself: the entire lift came from one Tuesday. One spike, probably a promo email I forgot about. Remove that day, gone.
The tool won't catch that. You have to.
Go pull the day-by-day chart on your last winner. If one day carries the result, you don't have a winner. Report back.
Split Test Street
@SplitTestStreet
Myth: your testing tool tells you when there's a winner
Этот пост опубликован в Telegram-канале Split Test Street. Подписаться можно по ссылке: @SplitTestStreet.