IN THIS DOCUMENT WE ANALYZE THE DATEBASE OF THE PREP, AS WELL AS THE ACOUNT OF VOTES BY DISTRICT IN ORDER TO ESTIMATE THE AMOUNT OF ERRORS TO OCCURE DURING THE COUNTING AND WE COME TO THE CONCLUSION THAT THE RESULTING FIGURE IS CONSIDERABLY HIGHER THAN THE FINAL DIFERENCE OF VOTES BETWEEN THE TWO CANDIDATES FELIPE CALDERÓN AND ANDRÉS MANUEL LÓPEZ OBRADOR.EN ESTE DOCUMENTO SE ANALIZA LA BASE DE DATOS DEL PREP, Y LA DE LOS CÓMPUTOS DISTRITALES PARA ESTIMAR LA MAGNITUD DE LOS ERRORES ESPERADOS DURANTE EL CONTEO DE LOS VOTOS Y SE CONCLUYE QUE ES MUCHO MAYOR QUE LA DIFERENCIA FINAL DE VOTOS ENTRE FELIPE CALDERÓN Y ANDRÉS MANUEL LÓPEZ OBRADOR.