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En una encuesta. A 25familias que comen en restaurantes chinosse obtuvo que la media de los consumidores fuede $3120.67 por mes.Datos anteriores indican que la

En una encuesta. A 25familias que comen en restaurantes chinosse obtuvo que la media de los consumidores fuede $3120.67 por mes.Datos anteriores indican que la desviacin estndar es de $176.53

Con 90% deconfianza,construyael intervalode confianza que estima el parmetro poblacional. Se puede comprobar que en promedio las familias gastan $4,000 en este tipo de comida por mes?

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