A scientist wishes to test a new antibiotic's ability to treat stubborn bacterial infections.He tests his hypothesis that the antibiotic works better than existing treatments by giving bacterial infections to mice and treating them with the antibiotic.He then determines how many of the mice recover from their infections.What is missing from his experimental design?

Question

Quizplus · Accepted Answer

The scientist is missing a control group of mice that did not receive the new antibiotic. This would allow for a comparison between the effectiveness of the new antibiotic and existing treatments, as well as a comparison between the effectiveness of the treatment and no treatment. Without a control group, it is difficult to draw firm conclusions about the effects of the new antibiotic.

A Scientist Wishes to Test a New Antibiotic's Ability to Treat