AVG() calculates the arithmetic mean (average) of the numbers in the specified list. The function sums all the numbers and divides by the count of numbers. This is useful for finding the central tendency of a set of values.
AVG(number1 [, number2, number3, ...])
AVG() returns a numeric value representing the arithmetic mean of the input numbers
AVG(3, 1, 2) = 2 (sum: 6, count: 3)
AVG(3, 1, 4, 2) = 2.5 (sum: 10, count: 4)
AVG(-3, 1, -4, 2) = -1 (sum: -4, count: 4)
AVG(10, 20, 30) = 20 (sum: 60, count: 3)
AVG(1.5, 2.5, 3.5) = 2.5 (sum: 7.5, count: 3)