The data was organized using the program Excel-Windows/XP, and was analyzed by the statistical services using the Statistical Analysis System SAS - System for Windows program, version 9.1.3 - 2002/2003.
Los datos fueron organizados en el programa Excel - Windows/XP, y analizados por el servicio de estadística con el uso del programa Statistical Analysis System SAS - System for Windows, versión 9.1.3 - 2002/2003.
Os dados foram organizados no programa Excel - Windows/XP, e analisados pelo serviço de estatística com o uso do programa Statistical Analysis System SAS - System for Windows, versão 9.1.3 - 2002/2003.