J

Hello Folks:

When you use just 2 variables for regression and then when you use the same 2 variables plus an additional 2 other independent variables, for me the regression coefficient decreases for the original independent variable that I used. Is that good or bad, and normally what that does imply?

Or in more technical terms:

Now take the same dependent variable you just used. Think of two other variables from our data set that might be related to it. Put all three independent variables into a multiple regression explaining your dependent variable. Is there a change in the regression coefficient (b) on the variable that you used by itself in the previous question – can you suggest why there is or isn’t a change?

Please advice.

Thanks

Mod Note: Please never delete an original post. All you do is remove any context from the thread and don't allow any future user to gain anything from the thread. I reverted the post back to the original. - Dason

When you use just 2 variables for regression and then when you use the same 2 variables plus an additional 2 other independent variables, for me the regression coefficient decreases for the original independent variable that I used. Is that good or bad, and normally what that does imply?

Or in more technical terms:

Now take the same dependent variable you just used. Think of two other variables from our data set that might be related to it. Put all three independent variables into a multiple regression explaining your dependent variable. Is there a change in the regression coefficient (b) on the variable that you used by itself in the previous question – can you suggest why there is or isn’t a change?

Please advice.

Thanks

Mod Note: Please never delete an original post. All you do is remove any context from the thread and don't allow any future user to gain anything from the thread. I reverted the post back to the original. - Dason

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