Question

From the table, calculate the mean score.
Scores 0—4 5—9 10—14
Frequency 2 1 2

Answer 1

7.

Explanation:

Calculate the means for each group:

mean of 0-4 is 2

mean of 5-9 is 7

mean of 10-14 is 12

Mean = (Sum of frequencies * mean) / sum of frequencies

= required mean = [ (2(2) + 1(7) + 2(12)] / (2+1+2)

= 35/ 5

= 7.