A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control group?

Question

Quizplus · Accepted Answer

The control group is the group that does not receive the treatment or intervention being tested, which in this case is the absence of nitrogen. Therefore, group D, which receives 0 pounds of nitrogen per acre, is the control group. Groups A, B, and C are the experimental groups receiving different amounts of nitrogen per acre.

A Scientist, Who Wants to Study the Effects of Nitrogen