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OpenStudy (anonymous):
The time required to finish a test is normally distributed with a mean of 60 minutes and a standard deviation of 10 minutes. What is the z-Score for a student who finishes the test in 45 minutes?
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jimthompson5910 (jim_thompson5910):
z = (x - mu)/(sigma) In this case, x = 45, mu = 60, and sigma = 10
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