Question

1. 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 one that receives the normal or standard treatment to compare with the experimental groups (which have the manipulated variable). Here, the tank fed the normal amount (once a day) is the control group as it represents the baseline for the goldfish feeding experiment, while the other tanks (fed twice, four times) are experimental groups with the independent variable (feeding frequency) manipulated.

Answer:

The tank of goldfish fed the normal amount (once a day) is the control group.