X 8 10 12 16 18 20 24 F 2 1 4 3 3 1 6 From the ... - JAMB Economics 2018 Question
| X | 8 | 10 | 12 | 16 | 18 | 20 | 24 |
| F | 2 | 1 | 4 | 3 | 3 | 1 | 6 |
From the table, Calculate the median___________
A
24.0
B
17.0
C
18
D
16
correct option: d
For a grouped data, we use cumulative frequency:
Median=[(N+1)/2]th
For member of odd number items. (ie. N is odd)
Median=([N/2[N/2+1]th)/2
Solution:
| X | 8 | 10 | 12 | 16 | 18 | 20 | 24 |
| F | 2 | 1 | 4 | 3 | 3 | 1 | 6 |
| Cumulative Frequency | 2 | 3 | 7 | 10 | 13 | 14 | 20 |
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