To explain the concepts of hypothesis testing (null and alternative hypothesis statements), I use an example of James Bond. His famous line is "shaken, not stirred" when ordering a martini.

In a hypothesis test, we would set the null (default) hypothesis to say that he cannot tell the difference. The alternative hypothesis would be proven if there was data showing he could tell the difference (better than guessing or chance).

Hope this helps you understand the concept of hypothesis testing a little more clearly.

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