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29 May, 21:41

The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of - 2.5. Which statement must be true?

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  1. 29 May, 21:47
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    From all those aforementioned, the true statement is: Thanh’s grade is 2.5 standard deviations below the mean of the test grades.
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