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.
1 The mean is the average of all your data points. 2  This is calculated by adding all of the numbers in your sample, then dividing this figure by the how many numbers there are in your sample (n). 3  In the sample of test scores (10, 8, 10, 8, 8, 4) there are 6 numbers in the sample. 4  Therefore n = 6.