Practice question · Select all that apply
Which are essential features of a well-designed controlled experiment?
Hints
- A good design must let you attribute the effect to one cause.
- Changing several things at once destroys that attribution.
Show the answer
- B. Repeated trials for reliability
- C. A control group for comparison
- D. Only one independent variable changed at a time
Why
Controlled experiments isolate one variable, include a control group, and use repeated trials.
Practise Scientific Method and Experimental Design
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