Precision - some definitions

1) ...Another measure of precision is the standard error of measurement, the standard deviation of a series of replicate determinations of the same quantity. Precision does not imply accuracy...

2) In statistics, precision is defined as the inverse of the variance of a measurement or estimate.

-- Last. A Dictionary of Epidemiology. 1988

OR

Precision in epidemiologic measurements corresponds to the reduction of random (or sampling) error.

-- Rothman. Modern Epidemiology. 1986.

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