For example the harmonic mean of three values a b and c will be. The mean of a probability distribution is the long-run arithmetic average value of a random variable having that distribution. Poisson Distribution Poisson Distribution Normal Distribution Distribution The median of a uniform distribution in the interval a b is a b 2 which is also the mean. . I created samples with a mean of 100 and standard deviation of 25 function RandNormalDist100 025. Statisticsharmonic_mean data weights None Return the harmonic mean of data a sequence or iterable of real-valued numbersIf weights is omitted or None then equal weighting is assumed. In a normal distribution. The precise shape can vary according to the distribution of the population but the peak is always in the middle and the curve is always symmetrical. Gaussian distribution also known as normal distribution is represented by the following probability density function. The