View Full Version : Precision of an experiment

Barker, Dan (rgh)
03-26-2000, 09:04 PM
Dear Biomech-l subscribers

To calculate the precision of a measuring device or experiment it is usual
to repeat the test a number of times ON ONE SPECIMEN, calculate the mean and
SD of the variable of interest i.e. strain, and then calculate the
coefficient of variation. CoV=standard dev./mean.

Is there however another method to assess precision when (for example 4)
DIFFERENT SAMPLES are tested twice each i.e. 8 measures (4 paired
measurements)? Therefore instead of multiple repeated tests of one specimen,
I have multiple specimens with only one repeated measure of each.

Thanks in advance

Dan Barker

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