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Thanks to discussions with Stephen Tashi for getting me this far.

See the problem statement in the attached PDF page 1. I need help solving for Qc in equation form, as a function of the other variables (N and C), preferably using erfc so I can program an accurate algorithm for very large values of N (>1E+16).

Pages 2 and 3 attempt to solve this problem, but only take me so far. Not sure if this is the right approach, of it there's just another step or two needed from what's presented there.

Looking forward if anyone can help me figure this out.

Best regards, Tim

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# Need statistics help working with normal distribution

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