Why is [itex]\chi^2 / \mathrm{ndf}[/itex] (number of degrees of freedom) close to one mean that a fit is a good fit?(adsbygoogle = window.adsbygoogle || []).push({});

I have had this question for a long time, and now I'm currently in a lab where the instructor and TA's love to see you talk about [itex]\chi ^2[/itex] -- so it's killing me! All I have ever heard is that itisa good fit, but I have never heardwhy. Or what the difference is between a being a little above or a little below one.

I hope math is a good board to put this in, I kind of feel like it's a statistics question.

Just a general question to quench my curiosity...

Thanks for any insight!

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# Why is chi^2/ndf close to 1 a good fit?

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