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In the Earth’s crust, the concentration of Aluminum follows a lognormal distribution with parameters µln =...

In the Earth’s crust, the concentration of Aluminum follows a lognormal distribution with parameters µln = 1.505 pph and sln = 1.10 pph. (Note: that pph means part-perhundred.) Despite the abundance of recycled Aluminum, a geological team from Alcoa is making a determination of potential mining conditions at possible locations in Canada. If the smallest 87.7% of the sampled concentration levels are considered unprofitable for mining purposes, what is the lowest possible concentration of aluminum needed in this location before mining operation could be considered financially viable?

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orchestra answered 2 years ago
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