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Tests & Measurements, Chapter 3

On a two-dimensional graph, the point on the Y axis where X equals 0.

Intercept

Residual

Correlation Coefficient

Regression Line

The difference between predicted and observed values from a regression equation.

Residual

Scatter diagram

Correlation Coefficient

Criterion Validity Evidence

The evidence that a test score corresponds to an accurate measure of interest.

Criterion Validity Evidence

Regression Line

Scatter diagram

Intercept

A picture of the relationship between two variables. For each individual, a pair of observations is obtained, and the values are plotted in a two-dimensional space created by variables X and Y.

Scatter diagram

Regression Line

Residual

Intercept

The best-fitting straight line through a set of points in a scatter diagram, found by using the principle of least squares.

Regression Line

Criterion Validity Evidence

Correlation Coefficient

Residual

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