18WHEN DATA DOESN’T CONVINCE YOU

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In the previous chapter, we used Bayesian reasoning to reason about two hypotheses from an episode of The Twilight Zone:

  • H The fortune-telling Mystic Seer is supernatural.
  • Image The fortune-telling Mystic Seer isn’t supernatural, just lucky.

We also learned how to account for skepticism by changing the prior odds ratio. For example, if you, like me, believe that the Mystic Seer definitely isn’t psychic, then you might want to set the prior odds extremely low—something like 1/1,000,000.

However, depending on your level ...

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