The regression models that we introduced in Sections 14 2 and 14 6 are linear in the xs, but, more important, they are also linear in the Icirc sup2 s Indeed, they can be used in some problems where the relationship between the xs and y is not linear For instance, when the regression is parabolic a...

The regression models that we introduced in Sections 14.2 and 14.6 are linear in the xs, but,

Question:

The regression models that we introduced in Sections 14.2 and 14.6 are linear in the x€™s, but, more important, they are also linear in the Î²€™s. Indeed, they can be used in some problems where the relationship between the x€™s and y is not linear. For instance, when the regression is parabolic and of the form

We simply use the regression equation µY|x = Î²0 + Î²1x1 + Î²2x2 with x1 = x and x2 = x2. Use this method to fit a parabola to the following data on the drying time of a varnish and the amount of a certain chemical that has been added: