Given the scores: 4, 7, 8, 11, 13, 8 with corresponding frequencies: 3, 5, 2,
MATHEMATICS
JAMB 2001
Given the scores: 4, 7, 8, 11, 13, 8 with corresponding frequencies: 3, 5, 2, 7, 2, 1 respectively. The mean score is
- A. 7.0
- B. 8.7
- C. 9.5
- D. 11.0
Correct Answer: B. 8.7
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Explanation
Mean = ?fx/?f
Mean = (4x3) + (7x5) + ... + (8x1) all divided by 20
Mean = 174/20 = 8.7