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A probability provides a quantitative description of the likely occurrence of a particular event.

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Probability and null hypothesis testing with a large number of independent variables

What is the probability of rejecting the null hypothesis (i.e. getting a statistically significant effect) in at least one of the tests? Suppose we ran 100 tests. … What is the probability of rejecting the null hypothesis (i.e. getting a statistically significant effect) in at least one of the tests? …