MATHEMATICS

JAMB 2001 - Question 43

Mathematics 2001 JAMB Past Questions - Question 43: Scores 4 7 8 11 13 8Frequency 3 5 2 7 2 1 The mean score is ?

Scores 4 7 8 11 13 8Frequency 3 5 2 7 2 1 The mean score is ?
Scores 4 7 8 11 13 8Frequency 3 5 2 7 2 1 The mean score is ?
A:
B:
C:
D:
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Correct Answer

C

Explanation

Mean = Efx /Ef = 174 = 8.To find the mean score, we need to calculate the sum of all the scores multiplied by their respective frequencies, and then divide by the total number of scores.Scores: 4, 7, 8, 11, 13, 8Frequencies: 3, 5, 2, 7, 2, 1To calculate the mean, we can use the formula:Mean = (Sum of (Score * Frequency)) / (Sum of Frequencies)Calculating the numerator:(4 * 3) + (7 * 5) + (8 * 2) + (11 * 7) + (13 * 2) + (8 * 1) = 12 + 35 + 16 + 77 + 26 + 8 = 174Calculating the denominator:3 + 5 + 2 + 7 + 2 + 1 = 20Mean = 174 / 20 = 8.7Therefore, the mean score is 8.7.