Nigerian Scholars » Past Questions » Mathematics » Given the scores: \(4, 7, 8, 11, 13, 8\) with corresponding frequencies: \(3, 5, 2, 7, 2, 1\)...

Given the scores: \(4, 7, 8, 11, 13, 8\) with corresponding frequencies: \(3, 5, 2, 7, 2, 1\)...


Question

Given the scores: \(4, 7, 8, 11, 13, 8\) with corresponding frequencies: \(3, 5, 2, 7, 2, 1\) respectively. The mean score is

Options

A) \(7.0\)

B) \(8.7\)

C) \(9.5\)

D) \(11.0\)

Explanation:

Mean \(= \frac{\sum fx}{\sum f}\)
Mean \(= \frac{(4 \times 3) + (7 \times 5) + (8 \times 2) + (11 \times 7) + (13 \times 2) + (8 \times 1)}{20}\)
Mean \(= \frac{174}{20} = 8.7\)


More Past Questions:


Discussion (4)

  • Mean \(= \frac{\sum fx}{\sum f}\)
    Mean \(= \frac{(4 \times 3) + (7 \times 5) + (8 \times 2) + (11 \times 7) + (13 \times 2) + (8 \times 1)}{20}\)
    Mean \(= \frac{174}{20} = 8.7\)

  • Sadiq Magaji

    summation of fx is 234 and summation of f is 20
    234/20 is 11.7

    Reply
    Like
  • Sadiq Magaji

    summation of fx is 234 and summation of f is 20
    234/20 is 11.7

    Reply
    Like
  • Mean \(= \frac{\sum fx}{\sum f}\)
    Mean \(= \frac{(4 \times 3) + (7 \times 5) + ... + (8 \times 1)}{20}\)
    Mean \(= \frac{174}{20} = 8.7\)