Only getting positive correlation coefficients

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Joined: Mon Jun 01, 2015 12:06 am

Only getting positive correlation coefficients

Postby jmp653 » Mon Jun 01, 2015 12:13 am

I am running basic linear regressions in IBM SPSS Statsitics Viewer, but am only getting psotive R values. Specifically, I am regressing annual growth rates of fish with temperatures seen over there periods of growth. I am getting what would clearly be a strong negative correlation (instances where as temperature increased, growth decreased), with a low p value and high r square, yet the r value remains positive. Even the slope of the line is negative in these instances. How is my output showing a negative slope but positive correlation coefficient? Any advice on this issue would be much appreciated, as only getting positive correlation values when there are negative trends is tiring.

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Joined: Tue Jun 10, 2008 4:50 pm

Re: Only getting positive correlation coefficients

Postby GerineL » Mon Jun 01, 2015 2:00 pm

we would need more info, but can you maybe try it with a different variable / dataset to see if the problem keeps occuring (you can add a variable yourself maybe to try it out). then you know if it is actually in your dataset or in spss.

also, can you show us the output maybe?

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