Mean: The "average" number; found by adding all data points and dividing by the number of data points.
Example: The mean of 44, 11, and 77 is (4+1+7)/3 = 12/3 = 4(4+1+7)/3=12/3=4.
- Mean is the most commonly used measure of central tendency. There are different types of mean, viz. arithmetic mean, weighted mean, geometric mean (GM) and harmonic mean (HM). If mentioned without an adjective (as mean), it generally refers to the arithmetic mean.