Question

What is the power of a statistical test?

Answer 1

Power of a statistical test if the probability of concluding alternative hypothesis when alternative hypothesis is in fact true.

Power, `P(` rejecting Null hypothesis, given that null is false `)`

In symbols, this means `1 - \beta = P(` Reject `H_0` | `H_0` is false)

Where `\beta =` Probability of type 1 error