LESSON: Standard Normal Distribution

The First Three Steps of Hypothesis Testing

We're finally wrapping up this lesson video! In this video we will see an example of a hypothesis test question and the first three steps for solving it.

Watch this video from 25:27 - End!

Standard Normal Distribution

In order to find the critical values (which denote the rejection regions), we need to use the Standard Normal Distribution, or Z-Distribution. In this lesson video you will get some practice and become familiar with the Standard Normal Distribution and using the Z-Table, which is linked in Week 8.

Some important things to remember about the Standard Normal Distribution:

1. The mean is set to 0 and the standard deviation is set to 1.
2. The total area under the Standard Normal Distribution curve is equal to 1.
3. The Z-Table shows us the probability of values falling below certain z values.
4. The Standard Normal Distribution is symmetric around 0.
5. The complement rule tells us that the areas under the curve sum to 1.