Editing Erlang distribution (section)

===Median===
An asymptotic expansion is known for the median of an Erlang distribution,<ref>{{Cite journal | last1 = Choi | first1 = K. P. | doi = 10.1090/S0002-9939-1994-1195477-8 | title = On the medians of gamma distributions and an equation of Ramanujan | journal = Proceedings of the American Mathematical Society | volume = 121 | pages = 245–251 | year = 1994 | issue = 1 | jstor = 2160389| doi-access =  }}</ref> for which coefficients can be computed and bounds are known.<ref>{{Cite journal | last1 = Adell | first1 = J. A. | last2 = Jodrá | first2 = P. | doi = 10.1090/S0002-9947-07-04411-X | title = On a Ramanujan equation connected with the median of the gamma distribution | journal = Transactions of the American Mathematical Society | volume = 360 | issue = 7 | pages = 3631 | year = 2010


 | doi-access = free }}</ref><ref>{{Cite journal | last1 = Jodrá | first1 = P. | title = Computing the Asymptotic Expansion of the Median of the Erlang Distribution | doi = 10.3846/13926292.2012.664571 | journal = Mathematical Modelling and Analysis | volume = 17 | issue = 2 | pages = 281–292 | year = 2012 | doi-access = free }}</ref> An approximation is <math>\frac{k}{\lambda}\left(1-\dfrac{1}{3k+0.2}\right),</math> i.e. below the mean <math>\frac{k}{\lambda}.</math><ref name=Banneheka2009>{{cite journal | last1 = Banneheka | first1 = BMSG | last2 = Ekanayake | first2 = GEMUPD | year = 2009 | title = A new point estimator for the median of gamma distribution | journal = Viyodaya J Science | volume = 14 | pages = 95–103 }}</ref>