One-sample T and two-sample T - tests were used to define degrees of freedom.
Para definir el grado de libertad fueron utilizadas los pruebas t uni-amostral one-sample T y t bi-amostral two-sample T - test.
Para definir o grau de liberdade foram utilizados os testes t uni-amostral one-sample T e t bi-amostral two-sample T - test.