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Observational Studies

  • The same set of statistics can produce opposite conclusions at different levels of aggregation.

    Thomas Sowell (1930 - )

  • A study in the Washington Post says that women have better verbal skills than men. I just want to say to the authors of that study: 'Duh.'

    Conan O'Brien (1963 - )

  • It is a common error to infer that things which are consecutive in the order of time have necessarily the relation of cause and effect.

    Jacob Bigelow (1787 - 1879)

  • I am not accustomed to saying anything with certainty after only one or two observations.

    Andreas Vesalius (1514 - 1564)

  • It is now proved beyond doubt that smoking is one of the leading causes of statistics.

    Fletcher Knebel (1911 - 1993)

  • The plural of anecdote is not data.

    Roger Brinner (1947 - )

  • On his standard of proof, natural science would never progress, for without the making of theories I am convinced there would be no observation.

    Charles Darwin (1809 - 1882)

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