It is often of interest to test or confirm that the
interarrival time data is from some particular distribution.
Thus, in order to justify the underlying distribution
of interarrival time from this data set, a goodness
of fit technique is implemented to determine the best
fitted division. In this study, four candidate
distributions (Exponential, Lognormal, Gamma, or
Weibull distribution) are used to find the best fitted
distribution.