A random variable X has poisson distribution with parameter u(greek letter mu). A sample of 200 observations from this distribution has a mean equal to 3.4. Construct an approximate 90% confidence interval for u.

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- April 13th 2010, 07:36 AMzamiconfidence intervals
A random variable X has poisson distribution with parameter u(greek letter mu). A sample of 200 observations from this distribution has a mean equal to 3.4. Construct an approximate 90% confidence interval for u.

- April 13th 2010, 09:06 AMcraig
- April 13th 2010, 09:31 AMzami
I"m not sure how to construct an interval for a Poisson distribution.

so far i have

p(x)= (µ^x e(-µ))/x! with µ=3.4 also the z value at 90% is 1.282

Where do I go from there?