Assigning each letter its positional value in the alphabet (A=1, B=2, etc.), adding the 26 values (351) and dividing by the number of letters in the alphabet (26) gives the Average Letter Value (ALV) of the alphabet (13.5). Similarly, dividing the total letter value of a word by the number of letters in the word gives the ALV of that word.
"The Alphabet Ruler,"
Word Ways: Vol. 33
, Article 9.
Available at: http://digitalcommons.butler.edu/wordways/vol33/iss2/9