Quote:
Originally Posted by FoxtrotGolfXray 5.0
I think, no matter how you look at the situation in NSW atm, it's not good.
Out of interest Russ, what's the correlation coefficient (r) value for that 3rd order polynomial trend in the first graph? Looking at the graph, I'd expect it be above +0.9?
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I would like to know the answer to that, since I have been following Russels trend line graphs I wondered just how he done 2 or 3 a day, that's why I read em and leave a thank you!
But, I thought I got my head around it but not sure now, from what I have gleaned and I'm probably wrong anyway, but you can't create an exponential trend line if data contains zero or negative values.
In my amateurish working out I couldn't get the R squared value of +0.9 so where did I go wrong?
So what is the value?..I am interested in working this stuff out on a 8" tablet and don't have Excel or the like.
Cheers Billy