andom
            variate</a> are lower case, usually k is integral, x if real, and
            <a href="http://en.wikipedia.org/wiki/Random_variable" target="_top">random variable</a>
            are upper case, K if integral, X if real. But this implementation treats
            all as floating point values <code class="computeroutput"><span class="identifier">RealType</span></code>,
            so if you really want an integral result, you must round: see note on
            Discrete Probability Distribu