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.
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.
Source: Wikipedia "Simpson's paradox" · CC BY-SA 4.0
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