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4. En un intento de estimar la demanda potencial futura, la National Motor Company realizo un estudio, en 1988, en el que preguntaba a parejas

4. En un intento de estimar la demanda potencial futura, la National Motor Company realizo un estudio, en 1988, en el que preguntaba a parejas casadas cuantos automoviles debe tener la familia promedio actual. Para cada pareja, promediaron las repuestas del hombre y la mujer, a fin de obtener la respuesta global de la pareja. Las respuestas se colocaron en una tabla:

Numero de autos ; 0 0.5 1.0 1.5 2.0 2.5

Frecuencia : 2 14 23 7 4 2

Calcule la varianza

Calcule la desviacion estandar.

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