This page teaches all you need to know about the Z-Score formula.
Watch each video and then use the Example Sheet as a model to help you do the practice exercises that go with that video on the Exercise sheet. Correct your own work with the Answer Sheet. Then move on to the next video.
1st Video: How to Find the Z-Score (Z):
2nd Video: How to Find the Mean (X-Bar):
3rd Video: How to Find the Standard Deviation (s):
4th Video: How to Find an Individual Data Point (Xi):
5th Video: How Each Value Influences the Others: