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WAEC Mathematics 2014 Question 19

Question 19

Measures of Central Tendency

The table shows the distribution of the height of plants in a nursery.
Height: 2, 3, 4, 5, 6
Frequency: 2, 4, 5, 3, 1
Calculate the mean height of the plants.

  1. A.3.8
  2. B.3.0
  3. C.2.8
  4. D.2.3
Show the answer and explanation

Answer: A (3.8)

Explanation

Σfx = 4 + 12 + 20 + 15 + 6 = 57 and Σf = 15. Mean = 57/15 = 3.8.