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JAMB Mathematics 1987 Question 49

Question 49

Measures of Central Tendency

Below are the scores of a group of students in a Music test.
Scores: 1, 2, 3, 4, 5, 6, 7, 8, 9
No. of students: 3, 6, 10, 8, 6, 5, 2, 4, 12
If CF(x) is the number of students with scores less than or equal to x, find CF(6).

  1. A.40
  2. B.38
  3. C.33
  4. D.5
Show the answer and explanation

Answer: B (38)

Explanation

Add the frequencies for scores 1 to 6: 3 + 6 + 10 + 8 + 6 + 5 = 38.