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OpenStudy (anonymous):
A person received a test score that was in the top 20% of everyone who has taken the test. The test scores are normally distributed. The persons Z score must be at least??
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OpenStudy (anonymous):
-9.68, 9.68, 59. 68, 99.68
OpenStudy (anonymous):
If someone can explain how to do the steps?
OpenStudy (anonymous):
I think you multiply 20% by the numbers. Which everyone is above 100% may be the answer.
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