Industrial Hygiene Exposure Assessment: The Good, Bad, and
Industrial Hygiene Exposure Assessment: The Good, Bad, and
Industrial Hygiene Exposure Assessment: The Good, Bad, and
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Example: Welding fume data -<br />
estimate GM <strong>and</strong> GSD<br />
Case xi (mg/m3 ) yi=ln(xi) (yi-y) 2 _<br />
1 0.84 -0.1744 0.055877<br />
2 0.98 -0.0202 0.006762<br />
3 0.42 -0.8675 0.864025<br />
4 1.16 0.1484 0.007463<br />
5 1.36 0.3075 0.060248<br />
6 2.66 0.9783 0.839600<br />
Sum = 0.3722 1.833976<br />
_<br />
y = 0.0620<br />
gm = 1.06<br />
gsd = 1.83