Tag Archives: Karl Pearson

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 in the 1990s and 2000s, and is becoming a quick … Continue reading

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Posted in Curious things | Tagged , , , | 127 Comments

Climate models outperformed by random walks

First, a bit of a primer. Wikipedia describes a random walk is a mathematical formalisation of a trajectory that consists of taking successive random steps. For example, the path traced by a molecule as it travels in a liquid or … Continue reading

Posted in Modeling | Tagged , , , , , , , , | 160 Comments