Saturday, September 08, 2012

XtransX to the minus one X transpose Y


X trans X to the minus one
X transpose Y
I said X trans X to the minus one
X transpose Y
you know that beta hat
is calculated like that

they call it OLS
when you want to regress
it's a fitting tool
that will give to you
the lowest RSS
yes that's the OLS

X trans X to the minus one
X transpose Y
I said X trans X to the minus one
X transpose Y
you know that beta hat
is calculated like that

Ordinary but rather neat
For ease of use it just can't be beat
A simple formula
and the calculation's complete
And you will find it BLUE
when all the assumptions are true

X trans X to the minus one
X transpose Y
I said X trans X to the minus one
X transpose Y
you know that beta hat
is calculated like that

they call it OLS
when you want to regress
it's a fitting tool
that will give to you
the lowest RSS
yes that's the OLS

2 Comments:

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