Sophie Chen
Contributor
Assessment Officer, Health Canada, Ottawa, Ontario. Her contributions to SAGE Publications's Encyclopedia of Research Design (2010) formed the basis of her contributions to Britannica.
Primary Contributions (1)
Regression to the mean (RTM), a widespread statistical phenomenon that occurs when a nonrandom sample is selected from a population and the two variables of interest measured are imperfectly correlated. The smaller the correlation between these two variables, the more extreme the obtained value is…
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