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Stem Plot Exam Grades Sec 2

M = 78.

Q1 : n = 13, (n+1)/2 = 14/2 = 7.

Q1 = 61

Q3 : n = 13, (n+1)/2 = 7.

Q3 = 87.

M = 77.5.

Q1: n=14; n/2 = 7, n/2+1 = 8

Q1 = (68+71)/2 = 69.5.

Q3 = (83+87)/2 = 85.