Z Scores Name: Wessel Johnson A z score, sometimes referred to as a standardized score, is another way to measure performance. This particular can be found below: score tells you how many standard deviations above or below the mean you are. The formula for calculating z scores x- mean Z = standard deviation , where x is the standardized score mean -30 - 20 -10 +10 +20 +30 Example Listed below are the grades from Mrs. Grubens's Algebra 2 class on the most recent test. 82 72 73 81 86 73 85 93 85 8C 67 79 83 77 79 74 89 75 77 77 80 90 83 83 78 The mean score on the test was an 80. The standard deviation was a 6. Addison scored an 86 on the test. Charlie scored a 72 on the test. Find Jane's z score was a 1.5. What did she Find his z score. his score. score on the test? Example 3