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JAMB Mathematics 2001 Question 43

Question 43

Measures of Central Tendency

Score: 4, 7, 8, 11, 13, 8
Frequency: 3, 5, 2, 7, 2, 1
Use the table above. The mean score is

  1. A.11.0
  2. B.9.5
  3. C.8.7
  4. D.7.0
Show the answer and explanation

Answer: C (8.7)

Explanation

Σfx = 12 + 35 + 16 + 77 + 26 + 8 = 174 and Σf = 20. The mean is 174 ÷ 20 = 8.7.