Statistical power is the probability of rejecting a false null
hypothesis. It is represented on the graph below by **1-b**. Remember that the
area under the curve of any graph represents relative frequency or probability.
So, we can calculate the statistical power of a test by determining the probability
our sample mean falling into the solid blue (**1-b**) area under the curve.

We can either learn how to calculate statistical power, or can move ahead to a discussion of the factors that influence statistical power.

Click here to see how to calculate statistical power. | |

Click here for factors that affect statistical power. |