Statistical Techniques for Transportation Engineering

In the above definition P(X=x) is called Poisson probability function and the corresponding Poisson distribution is

X	0	1	2	…	x	…
P(X=x)	$\frac{{\lambda }^0{e}^{-x}}{0!}$	$\frac{{\lambda }^1{e}^{-x}}{1!}$	$\frac{{\lambda }^2{e}^{-x}}{2!}$	….	$\frac{{\lambda }^x{e}^{-x}}{x!}$	…

4.21.3 Poisson Frequency Distribution

If an experiment satisfying the requirements of Poisson ...