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Please help me with this problem

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

B. 1

C. 3

D. 4

Note by Christina Morris
3 years, 2 months ago

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  Easy Math Editor

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Ameya Anjarlekar - 1 year, 11 months ago

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