Hypothesis Testing We start with an example


We conclude one of two possible conclusions



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We conclude one of two possible conclusions:
1. is false
-OR-
2. is true, and our sample mean just happens to lie in the most extreme 0.36% of its distribution.
In practice, events in the most 0.36% of their distributions seldom occur. Therefore, we have very strong evidence that is not true.
-------End of example----------
The test in the above example could have been formulated symbolically as
1. vs.
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