The level of significance was set at 5.0% and the statistical analyses were performed using the Statistical Package for Social Sciences SPSS software, release 12.0.
El nivel de significancia asumido fue del 5% y los cálculos se realizaron en el Statistical Package for Social Sciences SPSS, versión 12.0.
O nível de significância assumido foi de 5,0% e os cálculos foram realizados no Statistical Package for Social SciencesSPSS, versão 12.0.