Suburban counties
Consider the Categorical Variable County Classification with the following categories : Urban , Suburban Exurban , and Rural . The dependent variable in the Linear Regression is the percentage of the population under 18 years of age in decimal form . Suppose Urban is the excluded category . The coefficient on Suburban is 0.07 . The coefficient on Exurban is -0.002 . The coefficient on Rural is -0.12. What is the interpretation of the coefficient on Suburban ?
A. Suburban counties have a 7 percentage point higher population under 18 years of age compared to Urban counties
B. Suburban counties have a 7 percentage point higher population under 18 years of age compared to Rural counties
C. Urban counties have a 7 percentage point higher population under 18 years of age compared to Suburban counties
D. There no way to determine from these results how the percentage of the population under 18 years of age is different in different county classifications
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