You will also need to specify/ name your model:

Mod <- lm(Crime~.........

~Nicole Ford
Graduate Instructor
Department of Government and International Affairs
University of South Florida
office: SOC 012M
e: nmhicks@mail.usf.edu
http://gia.usf.edu/student/nford/

Sent from my iPhone

On Feb 14, 2013, at 6:55 PM, email <email8889@gmail.com> wrote:

> Hello:
> 
> I have a 4-column dataset: Crime, Education, Urbanization, Age. I want to
> construct a multiple linear regression to find the effect of Education,
> Urbanization, and Age on Crime"
> 
> lm(Crime ~ Education + Urbanization + Age)
> 
> If I use + in above statement, does it mean it will build a model to find
> the relationship between Crime and Education when Urbanization and Age are
> held constant?
> 
> What would be the difference if I drop the term Urbanization + Age ?
> 
> lm(Crime ~ Education)
> 
> Regards:
> John
> 
>    [[alternative HTML version deleted]]
> 
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