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Una encuesta revel que, de 785 sujetos seleccionados al azar y que completaron 4 aos de estudios universitarios, el 18.3% fuma y el 81.7% no

Una encuesta revel que, de 785 sujetos seleccionados al azar y que completaron 4 aos de estudios universitarios, el 18.3% fuma y el 81.7% no fuma (segn datos de la American Medical Association). Utilice un nivel de significancia de 0.01 para aprobar la aseveracin de que el porcentaje de tabaquismo entre quienes tienen cuatro aos de estudios universitarios es menor que el porcentaje del 27% registrado en la poblacin general. Por qu los graduados universitarios tienen una tasa menor de tabaquismo que el resto

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