In colloquial language, an average is the sum of a list of numbers divided by the number of numbers in the list. In mathematics and statistics, this would be called the arithmetic mean. In statistics, mean, median, and mode are all known as measures of central tendency.
Basically it says that “average” is not a mathematical or statistical term but means “arithmetic mean” which is the proper expression to use in math/stat context.
English Wikipedia says:
Basically it says that “average” is not a mathematical or statistical term but means “arithmetic mean” which is the proper expression to use in math/stat context.