b. Consider the following regression equation relating x 1 and the categorical variable to y. Ely) = Bo + B1x1 + ß 2 x 2 + B 3 x 3 Enter the values of dummy variables x 2 and x 3 that are used to indicate the three levels of the qu Level X 2 x 3 Select v Select 2 Select v Select 3 Select v Select v c. Interpret the parameters in your regression equation. B1 is the change in E(y) to a 1 unit change in Select v holding the categorical variable constant B 2 = Select

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Consider a regression study involving a dependent variable y, a quantitative independent variable x1, and a categorical independent
variable with three possible levels (level 1, level 2, and level 3).
a. How many dummy variables are required to represent the categorical variable?
b. Consider the following regression equation relating x 1 and the categorical variable to y.
E(v) = Bo + B1x 1 + B 2 x 2 + B 3 x 3
1X1 +
Enter the values of dummy variables x 2 and x 3 that are used to indicate the three levels of the qualitative variable.
Level
X 2
X 3
Select v
Select v
2
Select v
Select v
Select v Select v
c. Interpret the parameters in your regression equation.
B1 is the change in E(y) to a 1 unit change in Select v holding the categorical variable constant.
B2 =
Select
B 3 = Select
Transcribed Image Text:Consider a regression study involving a dependent variable y, a quantitative independent variable x1, and a categorical independent variable with three possible levels (level 1, level 2, and level 3). a. How many dummy variables are required to represent the categorical variable? b. Consider the following regression equation relating x 1 and the categorical variable to y. E(v) = Bo + B1x 1 + B 2 x 2 + B 3 x 3 1X1 + Enter the values of dummy variables x 2 and x 3 that are used to indicate the three levels of the qualitative variable. Level X 2 X 3 Select v Select v 2 Select v Select v Select v Select v c. Interpret the parameters in your regression equation. B1 is the change in E(y) to a 1 unit change in Select v holding the categorical variable constant. B2 = Select B 3 = Select
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