Question: Bee healed! Bee pollen is eff ective for combating fatigue, depression, cancer, and colon disorders. So says a Web site that off ers the pollen

Bee healed! “Bee pollen is eff ective for combating fatigue, depression, cancer, and colon disorders.” So says a Web site that off ers the pollen for sale. We wonder if bee pollen really does prevent colon disorders. Here are two ways to study this question. Explain why the second design will produce more trustworthy data.

Find 200 women who take bee pollen regularly. Match each with a woman of the same age, race, and occupation who does not take bee pollen. Follow both groups for 5 years.

Find 400 women who do not have colon disorders. Assign 200 to take bee pollen capsules and the other 200 to take placebo capsules that are identical in appearance. Follow both groups for 5 years.

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