A study by Bechtel et al., 2009, described in the Archives o…
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 in diameter) was approximately 7.2 with standard deviation 1.5. Assume that the monthly exposure is normally distributed. What is the probability of a monthly exposure between 3 and 5 ?