autocorrelation
C2CEFR level
88/100Rarity: very rare
TechnicalRegister
The correlation of a time series with a time-lagged copy of itself.
Weekly sales showed strong autocorrelation, so last week's figure was a decent predictor of this week's.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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