**X**_{1}**- one quantitative independent variables****X**_{2}**and X**_{3}**- two dummy variables used to describe a qualitative variable with 3 levels****X**_{4}**- a dummy variable used to describe a qualitative variable with 2 levels.**

** **

how would I go about building the 2nd order model?

### Recently Asked Questions

- Please refer to the attachment to answer this question. This question was created from Final_exam__Spring_2014.

- Please refer to the attachment to answer this question. This question was created from 6640FinalExamFall2016 (2).

- Please refer to the attachment to answer this question. This question was created from 6640FinalExamFall2016 (2).