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65. Una revista de abarrotes de circulacion nacional informa que el consumidor habitual pasa 8 minutos en la fila de espera de la caja registradora.

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65. Una revista de abarrotes de circulacion nacional informa que el consumidor habitual pasa 8 minutos en la fila de espera de la caja registradora. Una muestra de 24 clientes de una sucursal de Farmer Jack's revelo una media de 7.5 minutos con una desviacion estandar de 3.2 minutos. Es menor el tiempo de espera en esta tienda que el reportado por la revista? Utilice un nivel de significancia de 0.05

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