[denisa174]

Hello,

I am a bit confused about appellation and calculation of validation parameters.

Am I right that Accuracy is qualitative (not quantitative) parameter and is a combination of Trueness and Precision?

Am I right with calculation of Trueness?
ref/x_avg
where ref is reference value, x_avg is average (but sometimes I read median?)

And Precision depends on systematic error and is calculated
s/x_avg
where s is standard deviation based on a sample (or the entire population?), x_avg is average

Thanks for every answer