To determine if tap water was making people sick, scientists asked one group of people to drink tap water for a week and another group to drink only bottled water. The results showed that the group that drank the tap water were sick after a week. What can be concluded from this experiment?

Question

Quizplus · Accepted Answer

Although it seems likely that the tap water is causing an illness of some sort, there is not enough data linking the water to the sickness. For example, there could be another environmental factor making the people sick that wasn't accounted for in the study. Additionally, the scientists did not record or control any other aspect of the patients' diets, so another factor could have caused the sickness.

To Determine If Tap Water Was Making People Sick, Scientists