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A study by Bechtel et al., 2009, described in the Archives of Environmental & Occupational Health...

A study by Bechtel et al., 2009, described in the Archives of Environmental & Occupational Health considered polycyclic aromatic hydrocarbons and immune system function in beef cattle. Some cattle were near major oil- and gas-producing areas of western Canada. The mean monthly exposure to PM1.0 (particulate matter that is <1μm in diameter) was approximately 7.2 μg/m3 with standard deviation 1.5. Assume that the monthly exposure is normally distributed.

a. What is the probability of a monthly exposure greater than 9 μg/m3?

b. What is the probability of a monthly exposure between 3 and 5 μg/m3?

c. What is the monthly exposure level that is exceeded with probability 0.05? d. What value of mean monthly exp

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Expert Solution

since here part d is not asked completely I cant help to answer it here

milcah answered 1 year ago
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