
Regression
Hello everyone!
I have a question.
Let c = b  a and show the regression c on a has slope b hat  1 where b hat slope from regression b on a.
answer should be b hat = SSab/SSaa  1 (i think....)
What I want is to show that it is true. Could I please get help in answering this question.
I have attempted below.
c = b hat = SSac/SSaa
= [sum] (ai  c hat)(bi  b hat) / SSaa
= [sum] (ai  c hat)bi / SSaa  [sum] (ai  c hat)b hat / SSaa
= [sum] (ai  c hat)bi / [sum](aic hat)  1
Therefore, b hat = SSab/SSaa  1
is this correct?
Thanks for those who help me out.

Re: Regression
Hey Jon123.
By regression do you mean a simple y vs x regression (one independent, one dependent with one intercept)?

Re: Regression
Hi Chiro!
using simples linear regression model y on x, what I have used was b on a.
the question is quite confusing for me. I don't know how to start except for SSxc/Sxx i think?

Re: Regression
You are headed in the right direction: Just use the definition and show that you get what you get.