Simpson’s Paradox

“Simpson’s paradox (or Simpson’s reversal, Yule–Simpson effect, amalgamation paradox, or reversal paradox), is a 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.

s.v. Simpson’s Paradox, Wikipedia.

An example using arithmetic from the Stanford Encyclopedia of Philosophy:

1/5 < 2/8

6/8 < 4/5

7/13 > 6/13

2 thoughts on “Simpson’s Paradox

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s