Posted by H.T on Thursday, April 28, 2011 at 8:27am.
you can estimate the tenth of a mm digit, so 1.4, or 1.6 mm would be correct readings.
Absolute error then could be as low as .01cm (difference between say 1.5 mm and 1.4mm)
The question is not well written, I would have given the question a D. Absolute error depends on the reference (generally accepted as valid), which is not give.
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