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April 5th, 2013, 08:59 AM  #1 
Newbie Joined: Apr 2013 Posts: 2 Thanks: 0  Impact of changing Beta on confidence interval
Let's assume, that I got confidence interval for Beta in linear regression (B1,B2). Now I want to evaluate confidence interval for modified Beta. The new beta would be computed with following formula: new_beta=Beta/(1x). X is constant. Will new confidence interval be equal to : [B1/(1x),B2/(1x)] ? If not, then I don't know how to evaluate standard error, since I don't have historical data for new_beta. Thanks in advance and apologise if my question is too silly for you. 
April 5th, 2013, 11:47 AM  #2 
Newbie Joined: Apr 2013 Posts: 2 Thanks: 0  Re: Impact of changing Beta on confidence interval
Or would it be better, to create new interval with new_beta +/ t *D(new_beta) / (1x). Simple Adding and subtracting t*D(new_beta) without dividing by 1x will not be correct? 

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