Question: A study is being conducted and asked 1,000 people do they consider themselves overweight, and do they smoke? 650 people considered themselves overweight, while 200

A study is being conducted and asked 1,000 people do they consider themselves overweight, and do they smoke? 650 people considered themselves overweight, while 200 people current were smokers compared to 150 smokers of the 350 people who considered themselves not overweight.

a. What kind of study is this?

b. How would you analyze the results of this study?

Conduct a study to test whether coffee is a risk factor for stomach ulcers.

There are 1,000 patients with stomach ulcers and 800 patients without ulcers. Of the 1,000 patients with ulcers, 300 patients drink coffee and 700 patients do not.

a. What kind of study is this?

b. What is the odds ratio of getting stomach cancer if you drink coffee?

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