1. Chapter 9 Hypothesis Testing
9.6
The Probability of a Type II Error; the Power of the Test

2. The Probability of a Type II Error
Step 1: Determine the sample mean that separates the rejection region
from the nonrejection region.

4. Step 2: Draw a normal curve whose mean is a particular value from the alternative hypothesis with the sample mean(s) found in Step 1 labeled.

5. Step 3:

6. Step 3:

7. Step 3:

8. EXAMPLE The Probability of a Type II Error

10. EXAMPLE The Power of the Test
Compute the power of the test for the Harley Davidson example.

11. A power curve is a graph that shows the power of the test against values of the population mean that make the null hypothesis false.