SOLUTION: For a population with σ = 10, a score that is located 20 points above the mean would have a z-score of?

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Question 663816: For a population with σ = 10, a score that is located 20 points above the mean would have a z-score of?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
z = (x-mu)/sigma

z = ((20+mu)-mu)/10

z = (20+mu-mu)/10

z = (20)/10

z = 2