You suspect that the association between alcohol use and CHD might be confounded by smoking. You collect the following data:
|CHD||No CHD||CHD||No CHD|
|No Alcohol Use||20||10||40||80|
Calculate and interpret the appropriate measure of association between driver’s education and accidents.
The question arose as to whether gender might be an effect modifier of this association. When gender was assessed, the data looked like the following:
|Accident||No Accident||Accident||No Accident|
|No Driver’s Ed||40||50||40||80|
Perform the appropriate calculations to test for effect modification. Interpret your results.
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