Suppose that the response variable y is related to the explanatory variables x1 and x2 by the

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Suppose that the response variable y is related to the explanatory variables x1 and x2 by the regression equation

y̅ = 6 - 0.3x1 + 1.7x2

(a) Construct a graph similar to Figure 21 showing the relationship between the expected value of y and x1 for x2 =10, 20, and 30.

(b) Construct a graph showing the relationship between the expected value of y and x2 for x1 = 40, 50, and 60.

(d) Redo parts (a) and (b) with the interaction term 0.04x1x2 added to the regression equation. How do the graphs differ?

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Statistics Informed Decisions Using Data

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5th Edition

Authors: Michael Sullivan III

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Question Posted: Jan 04, 2018 02:46 AM

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Suppose that the response variable y is related to the explanatory variables x1 and x2 by the

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a b c The lines are parallel d ...View the full answer

Statistics Informed Decisions Using Data

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