Geometric Mean 2
Geometric Mean 2 : (a) A measure of central tendency. Calculable only for positive values. It is calculated by taking the logarithms of the values, calculating their arithmetic mean, then converting back by taking the antilogarithm. [Last, 1983: A Dictionary of Epidemiology]; (b) The nth root of the product of n values. [USEPA, 1992: GL for Exposure Assessment] [USEPA, 1992a: Dermal Exposure Assessment][USEPA, 1997b: Exposure Factors Handbook]
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