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Combining the effect of the linear and the Quadratic terms

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Sami100
 
Reply Wed 20 Jun, 2012 06:28 pm
Hi, I am running a regression model where I have a linear term and quadratic term of time as predictors. can I combine the 2 B coefficients in one? if yes, should I take the square root first for the quadratic term?

thanks in advance
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engineer
 
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Reply Wed 20 Jun, 2012 07:35 pm
@Sami100,
No, you can't combine them. If you just want one coefficient, just make a linear model.
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