SOLUTION: the ph of a chemical process is normally distributed with mean of 6.0 and standard deviation of 0.9. what is the z-score of ph 8.7?

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Question 1140872: the ph of a chemical process is normally distributed with mean of 6.0 and standard deviation of 0.9. what is the z-score of ph 8.7?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd=(8.7-6)/0.9 or +3