is denoted by has value continuous probability distribution skewness exponential distribution 2 Orlaith Burke Alejandra Gonzalez-Beltran Philippe Rocca-Serra The exponential distribution (a.k.a. negative exponential distribution) is the probability distribution that describes the time between events in a Poisson process, i.e. a process in which events occur continuously and independently at a constant average rate. It is the continuous analogue of the geometric distribution, and it has the key property of being memoryless. http://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.expon.html#scipy.stats.expon http://stat.ethz.ch/R-manual/R-patched/library/stats/html/Exponential.html dexp(x, rate = 1, log = FALSE) pexp(q, rate = 1, lower.tail = TRUE, log.p = FALSE) qexp(p, rate = 1, lower.tail = TRUE, log.p = FALSE) rexp(n, rate = 1) ready for release