P
puck1263
All,
I've got a piece of measuring equipment that I'm questioning the accuracy of (bias to standard). Our internal lab sent me a report showing bias and linearity through regression (r2 of .9999999). They used 3 standards of various values. Seems good.
However, I asked how many repititions of each measurement they toook and they said one per sample. This does not seem right to me. Shouldn't there be a deterimined sub-sample size based upon desired confidence intervals?
I'm a quality engineer and used to production sampling, but am new to calibration side.
Any advise would be appreciated.
I've got a piece of measuring equipment that I'm questioning the accuracy of (bias to standard). Our internal lab sent me a report showing bias and linearity through regression (r2 of .9999999). They used 3 standards of various values. Seems good.
However, I asked how many repititions of each measurement they toook and they said one per sample. This does not seem right to me. Shouldn't there be a deterimined sub-sample size based upon desired confidence intervals?
I'm a quality engineer and used to production sampling, but am new to calibration side.
Any advise would be appreciated.