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4. La siguiente tabla corresponde a la duracion de una muestra de llamadas telefonicas (en minutos). Clases frecuencia (minutos) 2-4 2 5-7 6 8-10 Calcula

4. La siguiente tabla corresponde a la duracion de una muestra de llamadas telefonicas (en minutos). Clases frecuencia (minutos) 2-4 2 5-7 6 8-10 Calcula la desviacion estandar de la muestra de llamadas

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