Examlex
With respect to drug testing, "use" and "impairment" refer to the same construct.
Independent Variable
A variable in an experiment or study that is manipulated or controlled by the researcher to test its effect on the dependent variable.
Exact Value
The precise, unrounded value of a number or expression without any approximation.
Sample Coefficient of Correlation
A measure indicating the degree and direction of linear relationship between two quantitative variables within a sample.
Estimated Regression Line
A line calculated from sample data that best fits the scatterplot of the data points, used to make predictions.
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