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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
Dan.Barker@rgh.sa.gov.au
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For information and archives: http://isb.ri.ccf.org/biomch-l
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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
Dan.Barker@rgh.sa.gov.au
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
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