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Categorical Variable Displays

Categorical Variable Displays. August 27, 2010 3. Examining Contingency Tables. Medical researchers followed 6,272 Swedish men for 30 years to see if there was any association between the amount of fish in their diet and prostate cancer. Examining Contingency Tables.

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Categorical Variable Displays

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  1. Categorical Variable Displays August 27, 2010 3

  2. Examining Contingency Tables • Medical researchers followed 6,272 Swedish men for 30 years to see if there was any association between the amount of fish in their diet and prostate cancer.

  3. Examining Contingency Tables Is there an association between fish consumption and prostate cancer?

  4. Simpson’s Paradox • An unfair averaging of numbers over several different groups

  5. Baseball isn’t as fun as Ultimate Frisbee, but it Makes for a Good Example • In the last inning of a close game your team is down with the bases loaded and two outs. • The pitcher is due up so you’ll be sending in a pitch-hitter. • Two batters are available.

  6. Actually, Ultimate could make a better example, but I digress…

  7. Practice • Pg. 40 – 44 • #’s 27, 30, 31, 36

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