**regression line** — a regression curve that is a straight line, indicating that two variables are in a simple direct or inverse arithmetic relationship. See also regression (def. 5) … Medical dictionary

**regression line** — A curve fitted to all mean values of one variable [16] … Lexicon of Cave and Karst Terminology

**Regression dilution** — is a statistical phenomenon also known as attenuation . Consider fitting a straight line for the relationship of an outcome variable y to a predictor variable x, and estimating the gradient (slope) of the line. Statistical variability,… … Wikipedia

**regression** — regression, regression analysis A term used originally to describe the fact that if, for example, parents and children s weights are measured, the children s weights tend to be closer to the average than are those of their parents: unusually… … Dictionary of sociology

**Regression toward the mean** — In statistics, regression toward the mean (also known as regression to the mean) is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on a second measurement, and a fact that may… … Wikipedia

**regression coefficient** — noun when the regression line is linear (y = ax + b) the regression coefficient is the constant (a) that represents the rate of change of one variable (y) as a function of changes in the other (x); it is the slope of the regression line • Topics … Useful english dictionary

**regression analysis** — noun the use of regression to make quantitative predictions of one variable from the values of another • Topics: ↑statistics • Hypernyms: ↑multivariate analysis • Part Meronyms: ↑regression, ↑simple regression, ↑ … Useful english dictionary

**regression curve** — noun a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line • Syn: ↑regression line • Topics: ↑statistics • Hypernyms: ↑curve • Part Holonyms: ↑ … Useful english dictionary

**Regression testing** — is any type of software testing which seeks to uncover software regressions. Such regressions occur whenever software functionality that was previously working correctly stops working as intended. Typically regressions occur as an unintended… … Wikipedia

**Regression** — Re*gres sion (r?*gr?sh ?n), n. [L. regressio: cf. F. r[ e]gression.] The act of passing back or returning; retrogression; retrogradation. Sir T. Browne. [1913 Webster] {Edge of regression} (of a surface) (Geom.), the line along which a surface… … The Collaborative International Dictionary of English