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Vous voulez tester si un changement de la recette de votre produit phare peut augmenter la satisfaction de vos clients. Vous mettez le changement en place sur une petite période. Si la satisfaction des clients est suffisamment supérieure sur cette courte période, vous changerez définitivement la recette. Comment choisirez-vous 𝐻0 si vous jugez qu'il serait pire de garder l'ancienne recette alors que la nouvelle recette augmente la satisfaction des clients que de changer la recette alors que la nouvelle recette n'augmente pas la satisfaction des clients?
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