“…Therefore, it can be assumed that these variables tend to present intercorrelation or collinearity (Scolforo, 2005;Silva, Ferreira, Silva, & Cespedes, 2009;Valente, Queiroz, Pinheiro, & Monteiro, 2011). Although this happened, the Student's t-test becomes important for choosing models with multiple parameters, presenting a value not different from zero and indicating that the variable is not relevant to explain significant variations in the response variable (Mayer & Butler, 1993;Rykiel Jr., 1996;Robinson & Froese, 2004;Adekunle, Nair, Srivastava, & Singh, 2013;Lima et al, 2014;Silva & Santana, 2014). Equations using log diameter alone as an explanatory variable resulted in adjustments with less statistical precision for all cases.…”