2001
Mathematics
JAMB
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: 8.7
Explanation
Mean = ∑fx/∑f Mean = (4x3) + (7x5) + ... + (8x1) all divided by 20 Mean = 174/20 = 8.7
Mean = ∑fx/∑f Mean = (4x3) + (7x5) + ... + (8x1) all divided by 20 Mean = 174/20 = 8.7THIS WEEK's
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