In probability theory and statistics, a median's described as the number separating the higher half of a sample, a population, or a probability distribution, from the lower half. The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one. If there's an even number of observations, the median isn't unique, so one often takes the mean of the two middle values. At most half the population have values less than… (More on Median)