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En 2003 el porcentaje de personas que no tena un seguro mdico (en Estados Unidos) era 15.6% (Statistical Abstract of the United Status, 2006). Se

En 2003 el porcentaje de personas que no tena un seguro mdico (en Estados Unidos) era 15.6%

(Statistical Abstract of the United Status, 2006). Se le pide a un comit del Congreso realizar un

estudio para obtener informacin actualizada.

a. Qu tamao de muestra le recomienda usted al comit, si el objetivo es que en la estimacin de la proporcin actual de individuos que no tienen seguro mdico el margen de error

sea 0.03? Use 95% de confianza.

b. Repita el inciso a usando 99% de confianza.

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