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The article "Stochastic Estimates of Exposure and Cancer Risk from Carbon Tetrachloride Released to the Air from

the Rocky Flats Plant" (A. Rood, P. McGavran, et al., Risk Analysis, 2001:675-695) models the increase in the risk of cancer due to exposure to carbon tetrachloride as lognormal with μ = -15.65 and σ = 0.79.


(a)          Find the mean risk.

(b)          Find the median risk.

(c)          Find the standard deviation of the risk.

(d)          Find the 75th percentile.

Top Answer

a. 2.1810^-7 b.... View the full answer


Given, J=-15.65 and 5= 0.79
Q )
the mean to loguemal distribution
E ( y ) = e
- 15.65 + 0.792
= 2.18 X 10
Median Risk -
let m he the median,
lay~N ( - 15.65 , 0-792 )
P ( y < m ) =...

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