(Solution Download) A study by Bechtel et al., 2009, described in the Archives of Environmental & Occupational...


A study by Bechtel et al., 2009, described in the Archives of Environmental & Occupational Health considered polycyclicaromatic 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 (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 8 µg/m3?(c) What is the monthly exposure level that is exceeded with probability 0.05?(d) What value of mean monthly exposure is needed so that the probability of a monthly exposure more than 9 µg/m3 is 0.01?

 







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