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WAEC Mathematics 2003 Question 3

Question 3

Measures of Central Tendency

The table below gives the distribution of marks obtained by a number of pupils in a class test.
Marks: 0, 1, 2, 3, 4, 5
Frequency: 4, 7, 12, 18, 11, 8
Find the median of the distribution

  1. A.1
  2. B.2
  3. C.3
  4. D.4
Show the answer and explanation

Answer: C (3)

Explanation

There are 60 pupils, so the median is between the 30th and 31st. The cumulative frequencies are 4, 11, 23, 41, so both have 3 marks: median = 3.