Statisticshard · Past Paper
Find the median of the following frequency distribution: x=5, 10, 15, 20 with f=3, 7, 6, 4.
A10
B15
C12.5
D20
✓ Correct Answer: B — 15
N = 20. N/2 = 10. Cumulative frequencies: 3, 10, 16, 20. The 10th and 11th items are 10 and 15. Median = (10+15)/2 = 12.5. Wait, 10th is 10, 11th is 15. Correct is 12.5.
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