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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- November 6th 2009, 03:14 PMstatman101percentile help with CDF
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! - November 6th 2009, 11:24 PMmatheagle
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.