A

#### andylin

I was wondering why I get a different kind of regression equation when I do the same data in a different way(create DOE in the minitab vs type the data myself ).

For example, when I do the job as the picture 1 below, I can get the regression equation:

(If there is no picture, please see the attachment)

However, If I create a new factorial design as the picture 2 below, I got a different equation, and I did not know how to use that equation to predict the response. I did the setting because I would like to analyze the 3 level experiment. I would like to know what the second equation means.

For example, when I do the job as the picture 1 below, I can get the regression equation:

(If there is no picture, please see the attachment)

However, If I create a new factorial design as the picture 2 below, I got a different equation, and I did not know how to use that equation to predict the response. I did the setting because I would like to analyze the 3 level experiment. I would like to know what the second equation means.

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