SOLUTION: If you take an exam and your score is the same as the mean score for the class, what is your z-score for the exam? I think I know the formula but can't seem to arrive to the conc

Question 490381: If you take an exam and your score is the same as the mean score for the class, what is your z-score
for the exam? I think I know the formula but can't seem to arrive to the conclusion. I feel like I am missing a piece here. HELP!

Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
No need for a formula here. The z-score is zero because it is the same as the mean (z-score is negative if you're below the mean, positive if you're above the mean). The formula for a z-score is

so if your score is the same as the mean, z = 0.
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