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 Probability that fit describes data correctly

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T O P I C    R E V I E W
swahelian Posted - 07/15/2010 : 6:44:22 PM
I have fitted a sinus function to a set of data and from the plot it seems like a good fit. The observed (calculated) Chi-square value is 30.5 and the expected Chi-square value is 34.

Are these Chi-square values enough to say something about the probabilty of my fit describing the data correctly, or do I need something else for that?
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larry_lan Posted - 07/15/2010 : 10:10:26 PM
Hi:

It's hard to tell. How about r square, p value, etc? Maybe this page can help.

Thanks
Larry

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