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A famous example of Simpson's paradox.
A data frame with 326 observations.
a subject id
a factor with levels Bl Wh)
Bl
Wh
a factor with levels Bl, Wh
a factor with levels Yes, No
Yes
No
a factor with levels death other
death
other
tally(penalty ~ defendant, data = DeathPenalty) tally(penalty ~ defendant + victim, data = DeathPenalty)
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