Author Question: Consider the model where x1 is a quantitative variable and x2 and x3 are dummy variables describing ... (Read 41 times)

faduma · **on:** Feb 14, 2020

Question 1

Consider the model

where x1 is a quantitative variable and x2 and x3 are dummy variables describing a qualitative variable at three levels using the coding scheme

The resulting least squares prediction equation is

What is the response line (equation) for E(y) when

and

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= 18.1 + 2.3x1
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= 16.3 + 4.1x1
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= 16.3 + 2.3x1
◦

= 18.6 + 2.3x1

Question 2

Consider the model

where x1 is a quantitative variable and x2 and x3 are dummy variables describing a qualitative variable at three levels using the coding scheme

The resulting least squares prediction equation is

What is the least squares regression equation associated with level 2?
◦

= 38.0 + 5.4x2
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= 39.9 + 1.3x1
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= 39.9 + 5.4x2
◦

= 42.1 + 1.3x1

josephsuarez · **Reply #1 on:** Feb 14, 2020

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