$5 million 1991 Disc jockey England Fast & Furious Joe McElderry Joe McElderry discography Joseph Joe McElderry Joseph McElderry Joseph Mcelderry Net Worth.
The arithmetic mean is the most common measure of central tendency. It is simply the sum of the numbers divided by the number of numbers. The symbol Î¼ is used for the mean of a population. The symbol M is used for the mean of a sample. The formula for Î¼ is shown below: Î¼ = Î£X/N
Median. The median is also a frequently used measure of central tendency. The median is the midpoint of a distribution: the same number of scores is above the median as below it. For the data in Table 1, there are 31 scores.