# ecotrix doubt again plzz help

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## ecotrix doubt again plzz help

 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

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

 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

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

 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

 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

 Neha ... from where you got the solutions for this ??? .... plzz provide the link ...please