Suppose you were examining whether a synthetic chemical reduced the growth rate of mice. Which action would you take to ensure a controlled experiment?
A) Allow some mice to roam between cages, while having others remained confined to a single cage.
B) Exclude one group of mice from exposure to the chemical, but otherwise treat all of the mice in the same manner.
C) Compare a natural population of mice exposed to the chemical to a natural population not exposed to the chemical.
D) Use computer programs to analyze the results from all treatment groups.

Question

Quizplus · Accepted Answer

A controlled experiment requires a control group that is not exposed to the experimental treatment, in this case, the synthetic chemical, to compare against the experimental group that is exposed.

Suppose You Were Examining Whether a Synthetic Chemical Reduced the Growth