Calculating the combined standard uncertainty
http://www.uttv.ee/naita?id=17643
https://www.youtube.com/watch?v=v6JZT2PkE-M
Numerical calculation of the uncertainty components: the Kragten method
http://www.uttv.ee/naita?id=17721
https://www.youtube.com/watch?v=qRx8cFVitgk
The initial XLS file (i.e. containing only the data but not the calculations) used in this example and the XLS file containing the also the combined standard uncertainty (and expanded uncertainty) calculation according to the Kragten’s approach can be downloaded from here:
 | uncertainty_of_photometric_nh4_determination_kragten_initial.xls | 49 KB |
| uncertainty_of_photometric_nh4_determination_kragten_solved.xls | 53 KB |
