Thank you, Nablator!
Your plot confirms that, in this case, a significant correlation exists.
From the list at the left of the graph, it seems to me that you have removed pages with no occurrences of either word? Above, Rene suggested to keep them:
I think it is well possible that, adding together several correlated phenomena, the result is something that appears to be uncorrelated (as your overall plot for ch- vs sh-). I also suspect that the fact that the ratio of chX vs shX is different for different Xs could blur things when all words are added up together?
Your plot confirms that, in this case, a significant correlation exists.
From the list at the left of the graph, it seems to me that you have removed pages with no occurrences of either word? Above, Rene suggested to keep them:
Quote:Pages with zero matches (for both words) should probably not be removed, as this is one of the possible results.I think that excluding those pages could result in a lower correlation coefficient.
I think it is well possible that, adding together several correlated phenomena, the result is something that appears to be uncorrelated (as your overall plot for ch- vs sh-). I also suspect that the fact that the ratio of chX vs shX is different for different Xs could blur things when all words are added up together?


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