Find an equation for the ellipse whose graph is shown. 
Definitions:
Fake Treatment
A placebo or sham treatment given to participants in research, which has no therapeutic effect.
Demand Characteristic
Cues in an experimental environment that communicate to participants how they are expected to behave.
Control Group
A control group in scientific experiments is the group of subjects that does not receive the treatment or experimental condition and is used as a benchmark to measure the effects of the treatment.
Control Group
In experimental research, a group of subjects that does not receive the experimental treatment and is used as a benchmark to measure how the other tested subjects do.
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