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OpenStudy (anonymous):
Mrs. Jones Algebra 2 class scored very well on yesterday’s quiz. With one exception, everyone received an A. Within how many standard deviations from the mean do all the quiz grades fall? 91, 92, 94, 88, 96, 99, 91, 93, 94, 97, 95, 97 A. 2 C. 3 D. 4
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OpenStudy (anonymous):
@agent0smith
OpenStudy (agent0smith):
Mean is 93.9, SD is 3.1, so all grades are within 2.
OpenStudy (anonymous):
A :)
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