auto correlation

autocorrelation

[aw-toh-kawr-uh-ley-shuhn, -kor-]
noun Statistics.
the correlation of an ordered series of observations with the same series displaced by the same number of terms.

Origin:
1945–50; auto-1 + correlation

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World English Dictionary
autocorrelation (ˌɔːtəʊˌkɒrɪˈleɪʃən)
 
n
Also called: serial correlation the condition occurring when successive items in a series are correlated so that their covariance is not zero and they are not independent

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