Question

experimental design quiz
highlight the control group.
a pet store owner wants to see what will happen if they feed tanks of goldfish different amounts of food. one tank of goldfish is fed the normal amount which is once a day; a second tank is fed twice a day; and a third tank is fed four times a day during a six - week study. the fishes body fat is recorded daily

Explanation:

In an experimental design, the control group is the group that is not subjected to the experimental treatment and is used as a baseline for comparison. Here, the experimental treatment is changing the amount of food fed to goldfish. The tank fed the normal amount (once a day) serves as the control group because it represents the standard or usual condition against which the groups with altered feeding amounts (twice a day, four times a day) are compared.

Answer:

The tank of goldfish fed the normal amount (once a day)