Study 1: JAPANESE Stomach Cancer No Cancer Eats Bacon 200 100 300 No Bacon 100 200 300 300 300 600 AMERICAN Stomach Cancer No Cancer Eats Bacon 115 265 380 No Bacon 20 200 220 135 465 600 Study 2: JAPANESE Stomach Cancer No Cancer Eats Bacon 200 100 300 No Bacon 100 200 300 300 300 600 AMERICAN Stomach Cancer No Cancer Eats Bacon 115 265 380 No Bacon 53 530 583 168 795 963 Is nationality a risk factor for stomach cancer? You may use 2-by-2 tables and calculation of odds ratio to make your assessment. You must show your work.

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