Hello,
this is my first mail to allstat (although I have been reading the archives for
a while)
I have been asked to assess the accuracy and precision of a new measurement
method (Let's call it method B). This new method is compared to an existing
one (A) that is considered to be "very accurage" and has its own specifications
in terms of stdev of a single measurement. What we do is to measure several
samples with method A and then with method B. Since A is very expensive, only
one A measurement per case is available. Method B is cheaper, so we measure
each sample with method B between 10 and 30 times. Another problem is that we
are unable to find samples that would span across the entire legal measurement
range, resulting in several samples in the first quartile of the range, several
in the last range quartile and almost no in between.
How can I assess the accuracy and precision of method B? Any help or link will
be appreciated.
Thank you very much
Jonathan James
P.S. This is not a homework.
P.P.S I admit, I don't know statistics well
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