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mean of the poisson distribution


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 find the mean of the poisson distribution using the method of expectation
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use the defintion of E(X) and remember that the poisson variable is discrete
so use summation cancel off the x ,leaving (x-1)! , manipulate the summation
into the exponential series
 answer and  some steps are given below
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mean of the poisson distribution
other problems on integration
integration formulae



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