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Une technicienne en Organisation et mthodes veut estimer le pourcentage d'utilisation de la photocopieuse de l'entreprise. Sur 400 observations, elle a obtenu : L'quipement est

Une technicienne en Organisation et mthodes veut estimer le pourcentage d'utilisation de la photocopieuse de l'entreprise. Sur 400 observations, elle a obtenu :

L'quipement est en utilisation 280 fois

L'quipement n'est pas en utilisation 120 fois

Quelle est la marge d'erreur associe un intervalle de confiance de 95%?

An Organization and Methods technician wants to estimate the percentage of use of the company's photocopier. Out of 400 observations, she obtained:

The equipment is in use 280 times

The equipment is not in use 120 times

What is the margin of error associated with a 95% confidence interval?

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