Jisho

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へいきんかい 平均回帰
Expressions (phrases, clauses, etc.), Noun
1. regression toward the mean; regression to the meanStatistics
Wikipedia definition
2. Regression toward the meanIn statistics, regression toward the mean (also known as regression to the mean) is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on a second measurement, and—a fact that may superficially seem paradoxical—if it is extreme on a second measurement, will tend to have been closer to the average on the first measurement.
Read “Regression toward the mean” on English Wikipedia
Read “平均への回帰” on Japanese Wikipedia
Read “Regression toward the mean” on DBpedia

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