Hello,

Could you please help me with the following questions? The three are not related to each other and are stand-alone questions!

• Why would you exclude women who cannot develop the disease as controls in a case-control study of gynecologic cancer?
• A random-digit dialed survey conducted in the City of Long Beach, California, reported that a greater proportion of nonsmokers endorsed a ban on smoking in alcohol-serving establishments than did smokers. What type of study design was this?
• An abrupt drop in mortality due to a specific cause is observed from one year to the next. Identify at least three possible reasons for such a change.

Thank you so much for your help!

(: