LESSON: Finding Z-Critical Values
| Site: | Mountain Heights Academy OER |
| Course: | Introductory Statistics Q3 |
| Book: | LESSON: Finding Z-Critical Values |
| Printed by: | Guest user |
| Date: | Friday, 4 April 2025, 11:54 AM |
Finding Z-Critical Values for a Lower Tail Test
We're slowly learning the steps for Hypothesis Testing. So far we've seen the first three steps. Then we learned about Standard Normal Distribution -- we did this in preparation for learning step 4 of hypothesis testing. In this lesson video I will show you how to do step 4 of hypothesis testing; using the standard normal distribution to find z-critical values.
Finding Z-Critical Values for an Upper Tail Test
In this video you will see an example of how to find z-critical values for upper tail tests. This type of test is slightly different than the lower tail test because our rejection region is shaded ABOVE our critical value.
Finding Z-Critical Values for Two Tail Tests
In this lesson video you will see an example of how to find z-critical values for a two tail hypothesis test. In two tail hypothesis tests there are TWO rejection regions. Therefore, we will need to find TWO z-critical values.