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.