Skip to main content
. Author manuscript; available in PMC: 2017 Aug 28.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2016 Nov 9;27(4):398–408. doi: 10.1038/jes.2016.60

Table A-II.

Formulas for estimating summary statistics from OEMD data that include N.

Input values Estimate Formula
Method #1′: v = 5 values, m = 6 equations (eqs. A1a, A1b, A5, A8a, A8b & A9), s = −1 (over-determined solutions)
N, Min, Max & AM
AM^=
AM or GMEGSD^lnGSD^
GSD^=
(Max/Min)1/EN[zMaz]
GM^=
GME or AM/GSD^lnGSD^

Method #2′: v = 4 values, m = 6 equations, s = 0 (exact solution)
N, Min & Max
GM^=
GME
GSD^=
(Max/Min)1/EN[zMaz]
AM^=
GM^GSD^lnGSD^

Method #3′: v = 3 values, m = 6 equations, s = 1 semi-empiric parameters (GSD)
N & Max
GM^=
Max/GSD¯EN[zMax]
AM^=
MaxQ-2EN[zMax], where Q=GSD¯lnGSD¯
GSD^=
GSD¯