The number of visitors set by the test plan before launch, based on the target effect and the area’s traffic. Until it’s reached, only a boundary crossed at a checkpoint allows a decision.
Le plan, figé au lancement, prévoit 58,900 visiteurs en 18 jours: de quoi détecter +5.5% sur le Revenue per visitor avec une puissance de 80%.
Au jour 18, 61,240 visiteurs sont entrés dans le test, soit 104% de l’échantillon prévu. Avant, seule une borne franchie à un point de contrôle aurait autorisé une décision.
Chiffres calculés par le moteur de Probant sur la boutique de démonstration, Maison Lune, fictive : ouvrir la démo.
The smallest lift the test has a good chance of detecting if it exists, with 80% power and a 5% risk. The smaller it is, the more visitors you need: aiming for an effect half as large takes about four times as many visitors.
The probability of detecting the target effect if it really exists. Probant plans at 80% power: a real effect of the target size goes unnoticed 20% of the time.
A moment set in the test plan when Probant reads the test to decide. Between checkpoints, the daily range is shown, but it isn’t enough to conclude. A test plan includes three by default, evenly spaced.
Create your workspace, or explore the demo first with data from a fictional store.