With penalties and minimum withdrawal requirements to consider, timing is of the utmost importance when taking money from your IRA. (Getty Images) Individual retirement accounts, commonly known as IRAs, are retirement fund staples for many people.
In statistics, the mean is the mathematical average of a set of numbers. The average is calculated by adding up two or more scores and dividing the total by the number of scores. Consider the following number set: 2, 4, 6, 9, 12. The average is calculated in the following manner: 2 + 4 + 6 + 9 + 12 = 33 / 5 = 6.6.
The Mean. The mean of a data set is what is most often meant by the common use of the word average. It is found by first adding all the data values, then dividing by the number of values. The sum of the test scores above is 869, and there are eleven scores. Thus the mean is 869/11 = 79.