<PRE><B>Question 1064696</B>
The parameter of this Poisson distribution is 4.68, 26% of 18.  Discrete, proportional to time, can be theoretically infinite.
For 10:
e^(-4.68)*4.68^10/10!
=0.0129.  The mean and variance would be expected to be 4.68, and the sd the sqrt (4.68), or 2.16
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e^(-4.68)(4.68^18)/18!=1.68 x 10^(-6)---For 18
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For 3: 
e^(-4.68)*4.68^3/3!=0.1585
The expected value is 4.68 customers.
The variance is the same as the expected value and the sd 2.16</PRE>