ecotrix doubt again plzz help

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ecotrix doubt again plzz help

Neha Gupta
Q: Consider any three-variable linear regression model:
Yt = α1 + α2X2t + α3X3t + u1t
Suppose you multiply all the X2 values by 2. What will be the effect of
this rescaling, if any, on the estimates of the parameters and their standard
errors?

Doubt: Will intercept and slope cofficients remain unaffected or get divided by 1/2 or any other answer?
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Re: ecotrix doubt again plzz help

happy
a2 become 0.5*a2
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Re: ecotrix doubt again plzz help

Neha Gupta
yes, according to me too, it should become half, but in gujrati, solution is given as 'remains unaffected if X2 changes'..
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Re: ecotrix doubt again plzz help

Neha Gupta
These are the equations which they are saying to verify from..
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Re: ecotrix doubt again plzz help

happy
These equation also show, slope coefficient of x2 become half, when X2 multiply by 2 then the Numerator of a2 will double and denominator become 4 time.
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Re: ecotrix doubt again plzz help

Neha Gupta
i also think the same..

thanks:)

Still if anybody has some other opinion, then please do write.
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Re: ecotrix doubt again plzz help

Seecha
Neha ... from where you got the solutions for this ???
.... plzz provide the link ...please
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Re: ecotrix doubt again plzz help

subhraminion
In reply to this post by Neha Gupta
solutions link plz
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Re: ecotrix doubt again plzz help

Neha Gupta
Guys, I don't know whether its available online or not,,
these are from tuition pdf notes, from where pdf is not able to be extracted even, otherwise even i would have posted obviously.

yes, u may post as many ques. u want from the book back ques. to ask on the forum here, i will post screenshots of all those( as i did in above case)
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