Friday

August 1, 2014

August 1, 2014

Posted by **Matt** on Saturday, February 10, 2007 at 3:22pm.

Using the Poisson distribution with a mean of m is this:

P(x) = e^(-m) m^x / x!

To find the mean, take n * p.

n * p = 7 * 0.90 = 6.3

Find P(4), P(5), P(6), and P(7). Add together for your total probability.

I'll get you started.

P(4) = e^(-6.3) 6.3^4 / 4! = 0.1205

Can you take it from here to finish?

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