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Se selecciona una muestra aleatoria de familias para estimar el ingreso promedio diario. El error debe estar en el rango de $22.000, con un riesgo
Se selecciona una muestra aleatoria de familias para estimar el ingreso promedio diario. El error debe estar en el rango de $22.000, con un riesgo de 0,045. De qu tamao debe ser seleccionada la muestra? La desviacin normal ha sido calculada en $88.000.
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