8. Our advice
8.1 Keep it simple but effective
Least squares regression (LSR) may be the most widely used regression, but it's still the most simplistic. If you have no other choice, remember to include the standard deviation Sy / x in your overall uncertainty ( U lin ). This standard deviation can be obtained using Excel's "Droitereg" function; it models the linearity and residual error generated by the chosen model (see figure S y/x = 1.60 on the left and 0.20 on the right).
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Bibliography
P.H. Cornillon, E.M. Lober, Regression – Theory and application , Ed Springer
Collège Français de Métrologie (CFM): "Application of the new VIM 3 calibration concept" and the associated M-CARE processing software, downloadable from the CFM website
ToolNormative reference
Standard NF T 90-210 "Qualité de l'eau – Protocol for the initial evaluation of the performance of a method in a laboratory".
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