Statisticshard · Past Paper
What is the Q1 of: 10, 20, 30, 40, 50, 60?
A15
B17.5
C20
D25
✓ Correct Answer: B — 17.5
N=6. Q1 position = (6+1)/4 = 1.75th item. Q1 = 1st + 0.75(2nd - 1st) = 10 + 0.75(10) = 17.5.
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