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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: denisa174 on September 15, 2021, 04:08:16 AM

Title: Accuracy x Trueness x Precision
Post by: denisa174 on September 15, 2021, 04:08:16 AM

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