A medical researcher is interested in testing a new medication for poison ivy. He decides to conduct a clinical trial on 250 volunteers who are...

A medical researcher is interested in testing a new medication for poison ivy. He decides to conduct a clinical trial on 250 volunteers who are allergic to poison ivy. He purposefully rubs poison ivy on their calf, then after the rash appears, he randomly chooses half of the volunteers and gives them calamine lotion, and the other half the new medication. For each volunteer, he measures the amount of time (in minutes) until the rash disappears completely