A multiple linear regression model involving one qualitative and one quantitative independent…

A multiple linear regression model involving one qualitative and one quantitative independent…

A multiple linear regression model involving one qualitative and one quantitative independent variable produced this prediction equation:

 = 12.6 + .54×1 – 1.2x1x2 +

a. Which of the two variables is the quantitative variable? Explain.

b. If x1 can take only the values 0 or 1, find the two possible prediction equations for this experiment.

c. Graph the two equations found in part b. Compare the shapes of the two curves.

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