9709 P53 - Nov 2023 - Q4
2455
The weights, x kg, of 120 students in a sports college are recorded. The results are summarised in the following table.
| Weight (x kg) | \(x ≤40\) | \(x ≤ 60\) | \(x ≤ 65\) | \(x ≤ 70\) | \(x ≤ 85\) | \(x ≤ 100\) |
|---|---|---|---|---|---|---|
| Cumulative frequency | 0 | 14 | 38 | 60 | 106 | 120 |
(a) Draw a cumulative frequency graph to represent this information.
(b) It is found that 35% of the students weigh more than W kg. Use your graph to estimate the value of W.
