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 m <strong>and</strong> s<br />
Case xi (mg/m3 ) ( xi-x ) 2<br />
_<br />
1 0.84 0.157344<br />
2 0.98 0.065878<br />
3 0.42 0.666944<br />
4 1.16 0.005878<br />
5 1.36 0.015211<br />
6 2.66 2.025878<br />
Sum = 7.42 2.937133<br />
_<br />
x =<br />
1.24<br />
sd = 0.77