Four groups of rats are tested in a lab. Group 1 is given a special hornmone for muscle growth. Group 2 is given a special multivitamin diet. Group 3 receives both the hormone treatment and the multivitamin diet. Group 4 does not receive any extra treatment or special diet. which of the groups is the control group for this experiment? Explain your reasoning.

group 4 because they are the group that nothing is happening to. they are what the scientists will compare the results back to.

hope that helps!

thank you

The control group in an experiment is used as a baseline to compare the results of the groups that receive the experimental treatments. It helps evaluate the effectiveness of the experimental treatments by providing a reference point.

In this experiment, the control group would be Group 4, which does not receive any extra treatment or special diet. The reasoning behind this choice is that the control group represents the natural or normal conditions. By comparing the results of Group 4 to the other groups, we can determine the impact of the hormone treatment, the multivitamin diet, and their combination.

In this case, Group 4 serves as a point of reference to measure the effects of the hormone treatment in Group 1, the effects of the multivitamin diet in Group 2, and the combined effects of the hormone treatment and multivitamin diet in Group 3. By comparing the outcomes of the experimental groups (1, 2, and 3) to the control group (4), researchers can determine if the treatments had any significant impact on muscle growth compared to no treatment at all.

The control group in an experiment is the group that serves as a baseline for comparison. It does not receive any special treatment or intervention and is used to assess the effects of the experimental interventions. In this case, Group 4 is the control group for the experiment.

The reason Group 4 is the control group is that it does not receive any extra treatment or special diet. By not intervening in any way with Group 4, the researchers can compare the results from the other groups to determine if the hormone treatment, multivitamin diet, or a combination of both have any effect on muscle growth.

By having a control group, researchers can observe and measure any changes or effects that occur within the other three groups and determine whether these changes are due to the specific interventions (hormone treatment or multivitamin diet). Comparing the experimental groups to the control group helps to establish a cause-effect relationship between the interventions and the observed changes in muscle growth.