if there are a finite number of elements, the median is easy to find. the values need to be arranged in a list, from the lowest to highest. if there is an odd number of values, the median is the one at position formula_3. for example, if there are 13 values, they can be arranged into two groups of 6, with the median in between, at position 7. with an even number of values, as there is no single number which divides all of the numbers to two halves, the median is defined as the mean of the two central elements. with 14 observations, this would be the mean of the elements at positions 7 and 8, which is their sum divided by 2.