SIX SIGMA Glossary: Regression Analysis

Regression analysis involves finding the line of best fit through a series of points. The calculation to find the line of best fit uses the least squares method and the outcome is a regression equation.

Regression analysis should always be carried out in conjunction with correlation analysis to find the goodness of fit.

Types of regression analysis include:

Linear Regression	A linear relationship with one input and one output
Logistics Regression	the output is a probability
Multiple Linear Regression	A linear relationship with several inputs

Note that if there are several inputs and/or outputs multivariate analysis is used. Strictly speaking multiple linear regression is a form of multivariate analysis although not usually referred to as such.

Regression analysis is covered in the MiC Quality course in Advanced Statistics.

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