Correlation, filtering, systems and degrees of freedom

Guest post by Richard Saumarez Correlations are often used to relate changes in climate variables in order to establish a potential relationship between them. These variables may have been processed…

The 'correlation is not causation' hockey stick

http://books.google.com/ngrams/graph?content=correlation+is+not+causation&year_start=1800&year_end=2008&corpus=0&smoothing=3 Mike Lorrey writes- PAY ATTENTION CLIMATE ALARMISTS: “The phrase ‘correlation does not imply causation’ goes back to 1880 (according to Google Books). However, use of the phrase took off…

Lucia takes on the Gergis et al hockey stick screening fallacy

This is an excerpt of a larger post that deserves the wider attention WUWT can bring to it. The image at left is from my article: A look at treemometers and…