SOLUTION: A data set has a z-score of 3 for the value 32 and a mean of 20. Find the standard deviation. I don't understand how to solve it. Instead of just giving the answer, could you

Question 308340: A data set has a z-score of 3 for the value 32 and a mean of 20. Find the standard deviation.

I don't understand how to solve it. Instead of just giving the answer, could you explain? Thank you. :-)
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
The z-score is defined by

where is the value, is the mean, and is the standard deviation.
Since you know , , and , solve for
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