This is a continuation of yesterday post.

In this post http://irthoughts.wordpress.com/2007/11/20/a-pagerank-rank-correlation/ we discuss a study that claims a PageRank-Rank correlation. The study was criticized by many SEOs on the grounds that it was flawed.

They were right, but none of them provided a statistical analysis assessment, which prompted back then our post.

The study seems to perpetuate SEO myths regarding ranking results.

If you look at the study, the reported slopes were very small, indicating that variables were almost orthogonal (independent), despite the correlation coefficients.

Second, no t-test confidence analysis on the correlation coefficents or slopes were provided.

Third, no transparency in the data sampling process was provided.

This is an example of how not to do stat analysis.

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