Im having some trouble with this, and I was hoping someone could help me.(adsbygoogle = window.adsbygoogle || []).push({});

I have a data set from which I've determined the [tex]\widehat{a}[/tex] and [tex]\widehat{b}[/tex] values and determined where the line of best fit should go using linear regression. The next thing I have to do is work out the varience using this equation:

[tex]\underline{\sum(y-\widehat{y})^2}

\\n-2[/tex]

(edit) Sorry, first time using latex, and I can't access the tutorials for some reason.

I've typed :

"\underline{\sum(y-\widehat{y})^2}

\\n-2"

But I'm not getting a new line after ^2}. How do I do this? (/edit)

I'm a bit unsure what to do here. Does that mean that I have to sum up all of my y values, and take away the expected y values that are predicted on my line of best fit which correspond to the actual values I've entered?

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# Linear regression and varience.

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