Topic
Simpson's paradox.
phenomenon in probability and statistics, in which a trend appears in several different groups of data but disappears or reverses when these groups are combined
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About Simpson's paradox
Simpson's paradox is a phenomenon in probability and statistics in which a trend appears in several groups of data but disappears or reverses when the groups are combined. This result is often encountered in social science and medical science statistics, and is particularly problematic when frequency data are unduly given causal interpretations. The paradox can be resolved when confounding variables and causal relations are appropriately addressed in the statistical modeling.
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