Model performance was determined for each location by calculating the mean bias error (MBE %) and the root mean square error (RMSE %). In addition, ... SME Shazly,KO Kassem,AA Hassan,... - 《Resources & Environment》 被引量: 4发表: 2012年 Mean absolute error and root mean square err...
Average error on testing data:error due to "bias" and error due to "variance“ 在测试中的误差来自于:偏差和方差 首先Regression的目的是,对于一组 training data,我们需要找到一个合适的model,进行拟合,使得这个model在test data上表现良好。 其次对于f(x),Estimate the mean of a variable x:assume the ...
The exact bias and mean squared error of forecasts on the left-hand endogenous variable of the structural equation under consideration and their asymptotic approximations (up to given order) have been obtained, in the special case when there are only two endogenous variables in the structural ...
If a linear regression model is used for prediction, the mean squared error of prediction (MSEP) measures the performance of the model. The MSEP is a function of unknown parameters and good estimates of it are of interest. This article derives a best unbiased estimator and a minimum MSE esti...
(Math. Phys.)the error the square of which is the mean of the squares of all the errors; - called also,mean square deviation,mean error. See also:Mean Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co. ...
In this article, the bias and mean square error (MSE) of the characteristic roots of the sample covariance matrix are studied when the parent population is nonnormal but is distributed following an -contaminated model based on a mixture of two multivariate normal distributions. The expressions for...
For these two estimators we provide simple elementary derivations of bias and mean square error. 1. Estimation of ordered means of two independent normal random variables Let X1 N("1;2) and X2 N("2;2) be two independent normally distributed random variables with common variance 2 > 0. ...
This paper develops the approximate finite-sample bias of the ordinary least squares or quasi max- imum likelihood estimator of the mean reversion parameter in continuous-time Levy processes. For the special case of Gaussian processes, our results reduce to those of Tang and Chen (2009) (when ...
mean-square-errorhazard functionproportional hazardsWeibull distributionUnder the assumption of random censoring, the exact bias and exact mean-square error of both the Kaplan-Meier estimator of the survival distribution and the Nelson-Aalen estimator of the hazard function are obtained and good, ...
This indicates that the bias we found in average Ellenberg indicator values cannot be explained by measurement errors or by regression to the mean. In the end, Smart & Scott, as we did, come to the conclusion that there is a bias present and that separate regression lines per vegetation ...