# 8.7 Learning Objectives Revisited

As a result of completing this chapter, you will be able to do the following:

- Write down the null and alternative hypotheses for a study (Section 8.1).
- Explain the difference between the type I and the type II errors and the relationship between these two types of errors (Section 8.2).
- Define the P-value, both mathematically and in plain English (Section 8.4).
- Distinguish between the one-mean
*Z*test and the one-mean*t-test*, and identify when each test should be used (Section 8.5). - Conduct a one-mean
*Z*and a one-mean*t-test*using the P-value or critical value approaches (Section 8.5). - Calculate the P-value or the range of the P-value for a hypothesis test (Section 8.5).
- Explain the relationship between confidence intervals and hypothesis tests. (Section 8.6).