Curve of Regression

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Curve of Regression

A realistic curve having a least-squares fit to the data points.
There are an infinity of least-squares curves to fit a set of data points (one curve of which touches every point). Therefore, the regression curve must be the best least-squares estimate (of the true curve of the phenomenon observed) that can be made in light of the data and prior knowledge of the physics of the phenomenon observed. Note that a regression curve is offset from the true curve by the amount of any bias error and of most systematic errors.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use