mean difference


Definition of mean difference

: the average of the absolute values of the n (n −1)/2 differences that exist between pairs in a statistical distribution of n elements

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of mean difference

1830, in the meaning defined above

Keep scrolling for more

Learn More about mean difference

Time Traveler for mean difference

Time Traveler

The first known use of mean difference was in 1830

See more words from the same year

Statistics for mean difference

Cite this Entry

“Mean difference.” The Dictionary, Merriam-Webster Inc., Accessed 11 December 2019.

Comments on mean difference

What made you want to look up mean difference? Please tell us where you read or heard it (including the quote, if possible).


heavy with or as if with moisture

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!