Dear Colleagues,
Simpson's paradox calls attention to the fact that a "trend" when looking at a whole group may not hold for subgroups of the whole group  in fact one may see "opposite" behavior in the two subgroups that make up a group from what one sees in the group. Examples of this phenomenon are useful in settings in lower grades where students are learning about percentages, fractions, and graphing data.
Here is the wiki article about this phenomenon
https://en.wikipedia.org/wiki/Simpson%27s_paradox
and a recent look at examples involving "human behavior."
https://arxiv.org/pdf/1710.08615.pdf
Regards,
Joe
Simpson's paradox
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Simpson's paradox
Joseph Malkevitch
Department of Mathematics
York College (CUNY)
Jamaica, New York 11451
email:
malkevitch@york.cuny.edu
web page:
http://york.cuny.edu/~malk
Department of Mathematics
York College (CUNY)
Jamaica, New York 11451
email:
malkevitch@york.cuny.edu
web page:
http://york.cuny.edu/~malk
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