Question

in an effort to increase milk production of dairy cows, a farmer decides to experiment with a new food additive. half the cows (group 1) are given the new food additive, while half of the cows (group 2) are not given the food additive. group 1 represents the _____ group of this experiment, while group 2 represents the _____ group of this experiment.

○ placebo, control

○ experimental, control

○ control, experimental

○ experimental, experimental

Explanation:

In experimental design, the group exposed to the test substance (the new food additive here) is the experimental group. The group not exposed to the test substance, used as a baseline comparison, is the control group. Group 1 gets the additive, so it is experimental; Group 2 does not, so it is control.

Answer:

experimental, control