Research Article
Biomass Modelling of Androstachys johnsonii Prain: A Comparison of Three Methods to Enforce Additivity
Table 4
Standard error of the expected and predicted values for different methods.
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Sources: Parresol [13], Lambert et al. [23], Parresol and Thomas [24], Snedecor and Cochran [25], and Yanai et al. [26]. = sum of squares of the independent variable; = standard deviation of the residuals; = particular value of for which the expected value is estimated, ; = estimated variance for the ith system equation on the observation ; = a row vector for the ith equation from the partial derivatives matrix , it is transposed; = estimated covariance matrix of the parameter estimates; = a column vector for the ith equation from the partial derivatives matrix ; = SUR system variance; = NSUR system variance; = the element of the covariance matrix of the residuals (error covariance matrix); it is the covariance error of the ith system equation; and = estimated weight. |