Box Cox Regression Model. Here only the depvar y is transformed by a box cox transform with the parameter. The normal error regression model with a box cox transformation is.
A few days ago a former student of mine david contacted me about box cox tests in linear models. It is considered a survival analysis method and is used to examine outcomes based on several variables during specific. Box cox transformation for simple linear regression 192 2 ncss llc.
Example 2 in this example we model the transform of diastolic blood pressure as a linear combination of the untransformed body mass index cholesterol level age and sex.
Box cox transformation for simple linear regression 192 2 ncss llc. The box cox transformations procedure is designed to determine an optimal transformation for y while fitting a linear regression model. Normality is an important assumption for many statistical techniques. This is the reason why in the minitab assistant a box cox transformation is suggested whenever this is possible for non normal data and why in the minitab regression or doe design of experiments dialogue boxes the box cox transformation is an option that anyone may consider if needed to transform residual data into normality.
