correlation coefficient


Definition of correlation coefficient

: a number or function that indicates the degree of correlation between two sets of data or between two random variables and that is equal to their covariance divided by the product of their standard deviations

Examples of correlation coefficient in a Sentence

Recent Examples on the Web The correlation coefficient between the Chinese currency and the region’s stocks rose to 47 percent this week. Washington Post, "Looking for a Trade War Winner? There Aren’t Any," 19 Sep. 2019 Super-resolution reflectivity and velocity are the must-haves in a radar app, but RadarScope doubles down with the addition of dual-pol products (correlation coefficient, differential reflectivity and more). Angela Fritz, Washington Post, "8 last-minute gift ideas for the weather geek in your life," 19 Dec. 2017 Even though the correlation coefficient was 0.1, running the algorithm in memory efficiently identified most of the correlated points, achieving results similar to a traditional classifier implemented in software. John Timmer, Ars Technica, "Who needs a CPU? Phase change memory acts as an analog computer," 26 Oct. 2017 Over the past five years, the dollar-yen exchange rate and the Nikkei 225 equity index have displayed a correlation coefficient of over 0.9, according to FactSet data. Mike Bird, WSJ, "Dollar’s Fall Threatens Foreign Stock Markets," 31 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'correlation coefficient.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of correlation coefficient

1895, in the meaning defined above

Keep scrolling for more

Learn More about correlation coefficient

Time Traveler for correlation coefficient

Time Traveler

The first known use of correlation coefficient was in 1895

See more words from the same year

Statistics for correlation coefficient

Last Updated

17 Nov 2019

Cite this Entry

“Correlation coefficient.” The Dictionary, Merriam-Webster Inc., Accessed 11 December 2019.

More from Merriam-Webster on correlation coefficient Encyclopedia article about correlation coefficient

Comments on correlation coefficient

What made you want to look up correlation coefficient? 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!