测定室内空气中甲醛的加权回归直线与等权回归直线的对比

A contrast about the weighted regression line and the isobar regression line of the measurement about formaldehyde of indoor air

对分光光度法测定室内空气中甲醛的回归方程进行加权分析和等权分析,找出两者之间的区别和联系,从而确定是否采用加权分析以达到测试结果的准确度。如等权回归能达到准确度要求,则采用等权回归即可;如需要更高的准确度要求,而等权回归达不到,建议采用加权回归处理更可靠。

Through the analysis of the weighted or isobar regression equation of the measurement of formaldehyde in indoor air by spectrophotometry method, the author finds out the differences and the relations between them. Then it is determined whether or not to adopt weighted regression in order to a- chieve the accuracy of test results. If it meats the accurate demand by adopting the isobar regression, it is ok. If it requires the higher accuracy, and the accuracy can not be achieved by the isobar regres- sion, it is more reliable to adopt weighted regression.