A scientist wants to determine whether a new chemical she isolated can cure a certain disease.To test her hypothesis that the new chemical cures the disease more effectively than current treatments, she infects mice with the disease and gives them the new chemical.She then assesses how many mice were cured of the disease.What is missing from her experimental design?

Question

Quizplus · Accepted Answer

The scientist is missing a control group of mice that did not receive the new chemical. Without this group, there is no way to assess whether the new chemical is actually more effective than current treatments or if the disease simply went away on its own. A control group would allow for comparison and for the effects of the new chemical to be isolated.

A Scientist Wants to Determine Whether a New Chemical She