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Un gerente desea probar la resistencia de la tensin del hilo que ha de usarse en las nuevas mquinas de la empresa, el cual debe

Un gerente desea probar la resistencia de la tensin del hilo que ha de usarse en las nuevas mquinas de la empresa, el cual debe ser de por lo menos 25 libras. Se toma una muestra aleatoria de 16 carretes y se encontr una resistencia promedio de 23 libras. con una desviacin estndar 0.2 libras. El hilo es apropiado con un nivel de significancia del 5%?

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