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X 8 10 12 16 18 20 24 F 2 1 4 3 3 1...

Economics
JAMB 2018

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
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Correct Answer: Option D
Explanation

When a group data is involved, cumulative frequency is used. The formula will be:

  Median=[(N+1)/2]th

  For member of odd number items. That is, where N is odd

  Median=([N/2[N/2+1]th)/2

  For member of odd number items. That is, where N is odd

  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

 

When a group data is involved, cumulative frequency is used. The formula will be:

  Median=[(N+1)/2]th

  For member of odd number items. That is, where N is odd

  Median=([N/2[N/2+1]th)/2

  For member of odd number items. That is, where N is odd

  Solution:


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