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
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Mean = ∑fx/∑f
Mean = (4x3) + (7x5) + ... + (8x1) all divided by 20
Mean = 174/20 = 8.7
Source: Myschool Past Questions Archive (Record #2867)