In Week 5 of math class I learned about Z scores, z score is used  when you search for a certain number that is in relation to the average . The most common place you will see Z scores are being used is in university and college where the professor will want to find what the average score for the class is. If you want  to find a z score, you use x-μ over stigma. μ Will be your  average and x will be the mark that you have gotten.