JAMB 2000 · UME · Q46
The cumulative frequency curve represents the ages of 100 students in a school. Which age group do of the students belong to?
Worked solution (try it first)
- The number of students in an age group is the cumulative frequency at its top end minus the cumulative frequency at its bottom end.
- From the curve, the cumulative frequency is 30 at 17.5 years and 100 at 20.5 years, so students are aged 17.5–20.5.
- That is of 100, option D.
- The other groups hold 60, 90 and 82 students.