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Some of the correlations are interesting and could be used for marketing purposes.

Ruby: CSS is 25.76 Python: CSS is 15.75

Go is gaining fastest adoption from C, Ruby and Python developers.

TBH I can't remember the last time I saw non-normalized correlations in a study and the paper lost some credibility.. who does that, and why? What does a correlation of 25.76 mean? Relative to what? That's why you bound it 0 to 1.

Correlation is constrained to 0 and 1 as a side effect of the mathematics.

The definition of correlation mentioned in the paper makes zero sense whatsoever and apparently invokes Bayes's rule?

the correlation is that out of the people that program in language A, X% of them also program in language B. This can also be expressed as given that someone programs in language A, the probability that they program in language B is X. It looks like the table is expressing the correlation in terms of % even though they dont mention that on the table.

EDIT: I'm dumb

Because they're percentages.

Or are any of them greater than 100?

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