charleymar14 charleymar14

23-10-2022
Mathematics

contestada

A school has a ninth-grade class of 650 students. A teacher looks at the biology grades of a sample of 15 of these students. The correct notation for the mean and standard deviation of these 15 students' grades is:
A. X and o
B. μ and s
C. μ and o
D. X and s

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