According to one source, the word “mode” was first used (by Karl Pearson) in 1895. The concept of the “median” is a bit older; it was used for the first time by the Frenchman Antoine Cournot in 1843. The notion of the “arithmetic mean” is even older.

QUESTION: When do you think the concept of the “arithmetic mean” was born?

ANSWER: A long, long, LONG time ago. The Pythagoreans studied it in the 5th century B.C.