Concepts inAlgorithm 780: exponential pseudorandom distribution
Pseudorandomness
A pseudorandom process is a process that appears to be random but is not. Pseudorandom sequences typically exhibit statistical randomness while being generated by an entirely deterministic causal process. Such a process is easier to produce than a genuinely random one, and has the benefit that it can be used again and again to produce exactly the same numbers - useful for testing and fixing software.
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Probability distribution
In probability theory, a probability mass, probability density, or probability distribution is a function that describes the probability of a random variable taking certain values. For a more precise definition one needs to distinguish between discrete and continuous random variables. In the discrete case, one can easily assign a probability to each possible value: when throwing a die, each of the six values 1 to 6 has the probability 1/6.
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Area code 780
Area code 780 is a telephone area code in the province of Alberta, encompassing the northern two-thirds of the province. The code was established in 1999; prior to this date the entire province was served by the 403 area code. The 780 phone code started use on January 25, 1999; the old 403 code forwarded calls until May 18, 1999. Mandatory provincewide 10-digit dialing began on September 12, 2008.
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Exponential distribution
Exponential Parameters ¿ > 0 rate, or inverse scale Support x ¿ [0, ¿] PDF ¿¿e CDF 1 ¿ e Mean ¿ Median ¿¿ln¿2 Mode 0 Variance ¿ Skewness 2 Ex. kurtosis 6 Entropy 1 ¿ ln(¿) In probability theory and statistics, the exponential distribution (a.k.a. negative exponential distribution) is a family of continuous probability distributions. It 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.
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