How to ... calculate a customized statistic calculation from the standard statistics (OpenLAB CDS Intelligent Reporting)

File uploaded by agilent Employee on Mar 11, 2016Last modified by agilent Employee on Mar 28, 2016
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A customer had to use the following formula to calculate the "variance"  of his repeated injection:


a = Peak area

                                a(1)  -   a(2)

Variance(custom) =  ---------------------  x  100



The result can easily be calculated by multiplying the RSTDEV by  1.41421  and applying the % number format (which will multiply the result by 100)


The attached document shows the proof of equivalence.


(originally posted in OpenLAB Forum:

2012 June 27  by betrich)