1. Which could be called a before-and-after design: a study to see if people can lower their cholesterol by eating oatmeal every day for a month, or a study to see if breast-fed infants have fewer...

1. Which could be called a before-and-after design: a study to see if people can lower their cholesterol by eating oatmeal every day for a month, or a study to see if breast-fed infants have fewer infections than do bottle-fed infants?

2. Describe how a study could test the effectiveness of the hair restoration drug Rogaine using a combination of paired and two-sample designs.