December 17th, 2008, 04:22 PM
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 | Flow Master | | Join Date: Dec 2007 Location: Zeitgeist
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Quote:
Originally Posted by iliketurtles  this is what I know :
So...
p = .2
q = .8
n = 120
np = 120(.2) = 24 = standard dev Mr F says: NO. This is the mean.
npq = 19.2 Mr F says: This is the variance. The square root is the standard deviation.
and I have the equation Z = (x - (np))/sqrt(npq)
no idea what to do from there... | You have Y ~ Normal  .
Calculate  .
You must have been taught how to do calculations using a normal distribution ....?
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