I need to understand part b.
how did they get n(p)
in other words, how did they go from
p = F(n(p)) ......to n(p)
see the attachment!
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That's just the quadractic equation. Let x be the percentile
so p=F(x) or
multiply by x and create a quad equation
NOW solve for x and discard the bad solution.
Last edited by matheagle; November 6th 2009 at 10:36 PM.
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