The best calibration IMO exercises I was able to find (which also work for non-Americans) can be downloaded from the website of How to Measure Anything.
http://ââwww.howtomeasureanything.com/ââ
The best calibration IMO exercises I was able to find (which also work for non-Americans) can be downloaded from the website of How to Measure Anything.
http://ââwww.howtomeasureanything.com/ââ