云南化工2024，Vol.51Issue(1)：82-87,6.DOI:10.3969/j.issn.1004-275X.2024.01.20
基于数理统计方法的水质总氮校准曲线残差值检验
Residual Value Test of Determination Calibration Curve of Total Nitrogen in Water Based on Mathematical Statistics Method
杨玉凤1
作者信息
- 1. 昆明滇池水务环境监测有限公司,云南 昆明 650200
- 折叠
摘要
Abstract
Objective Exploring the normality,independence,and homoscedasticity of residual values in the determination calibration curve of total nitrogen in water.Methods Six measurements of nitrate nitrogen standard solutions with different concentrations were conducted within a year,and the calibration curve was fitted using the measurement results to calculate the residual value.Test the normality of residual values through QQ diagrams and Anderson Darling(AD)method;Test the independence of residual values through graphical and DW methods;Test the homoscedasticity of residual values through Residual Plots and Rank Correlation Coefficient methods.Results The residual value of this sam-ple satisfies normality,but does not satisfy independence and homoscedasticity.Conclusion The curve fitting of data using Ordinary Least Squares method needs to be based on a series of assumptions.In actual work,we cannot blindly default the establishment of relevant assump-tions,and should combine mathematical statistics theory with laboratory testing to ensure the reliability of curve fitting.关键词
校准曲线/残差值/正态性/独立性/同方差性Key words
calibration curve/residual value/normality/independence/homoscedasticity分类
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杨玉凤..基于数理统计方法的水质总氮校准曲线残差值检验[J].云南化工,2024,51(1):82-87,6.
