SOLUTION: Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the z-value for a score of 90?
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Question 675479: Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the z-value for a score of 90?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the z-value for a score of 90?
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z(90) = (90-78)/25 = 2/25 = 0.08
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Cheers,
Stan H.
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