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WAEC Mathematics 1992 Question 41

Question 41

Measures of Central Tendency

The data below shows the frequency distribution of marks scored by a group of students in a class test.
Marks: 2, 3, 4, 5, 6
Frequency: 2, 4, 5, 3, 1
Find the mean mark.

  1. A.1
  2. B.1.3
  3. C.2
  4. D.3
  5. E.3.8
Show the answer and explanation

Answer: E (3.8)

Explanation

Σfx = 4 + 12 + 20 + 15 + 6 = 57 and Σf = 15, so the mean = 57 ÷ 15 = 3.8.