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Una casa de cambio ha tomado los tiempos de llegada de clientes, lo registra como una distribucin normal con una desviacin estndar de . Eligen

Una casa de cambio ha tomado los tiempos de llegada de clientes, lo registra como una distribucin normal con una desviacin estndar de . Eligen al azar una muestra de 17 tiempos, encuentra la probabilidad de que la varianza muestra sea mayor que 2

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