The regression line 
= 3 + 2X has been fitted to the data points (4,14),(2,7),and (1,4).The sum of the residuals squared will be 8.0.
Definitions:
Control Group
In an experiment, a group of participants who are not exposed to the independent variable.
Estrogen
The primary female sex hormone.
Analogue Experiments
Research methods where conditions are artificially created to resemble real-life situations in order to study behaviors or outcomes.
Natural Experiments
Studies where the researcher takes advantage of a natural event to study its effects on subjects, without any manipulation by the researcher.
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