4. A biologist hypothesizes that restricting food from rats will decrease their activity. He designs an experiment in which he observes the activity of 50 mice under restricted food regimens. Which of the following is true about his study? (1 point)
The study is designed well since it uses a large sample of mice.
The study does not include a control group.
The study includes too many variables.
The results will allow the biologist to draw a valid conclusion.

Question

4. A biologist hypothesizes that restricting food from rats will decrease their activity. He designs an experiment in which he observes the activity of 50 mice under restricted food regimens. Which of the following is true about his study? (1 point) 
The study is designed well since it uses a large sample of mice. 
The study does not include a control group. 
The study includes too many variables. 
The results will allow the biologist to draw a valid conclusion.

kamille · Answer

The study does not include a control group.

anonymous · Answer

there's a need for a controlled group all the time or the experiment will not be reliable.