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OpenStudy (anonymous):
Suppose you have a mean standardized score of 1500 points with a standard deviation of 150 points. This data is normally distributed. What is the z-score of 1225 points?
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OpenStudy (kropot72):
\[Z=\frac{X-\mu}{\sigma}=\frac{1225-1500}{150}=?\]
OpenStudy (kropot72):
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