Statisticshard · Past Paper
Find the Q1 of a continuous series where N=100, lower limit of Q1 class is 10, h=10, f=20, and cf=15.
A15
B12.5
C17.5
D20
✓ Correct Answer: A — 15
Q1 = L + [(N/4 - cf)/f]*h = 10 + [(25 - 15)/20]*10 = 10 + (10/20)*10 = 10 + 5 = 15.
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