9709 P63 - Jun 2015 - Q6
2469
Seventy samples of fertiliser were collected and the nitrogen content was measured for each sample. The cumulative frequency distribution is shown below.
| Nitrogen content | \(\le 3.5\) | \(\le 3.8\) | \(\le 4.0\) | \(\le 4.2\) | \(\le 4.5\) | \(\le 4.8\) |
|---|---|---|---|---|---|---|
| Cumulative frequency | 0 | 6 | 18 | 41 | 62 | 70 |
- On graph paper, draw a cumulative frequency graph to represent the data.
- Estimate the percentage of samples with a nitrogen content greater than \(4.4\).
- Estimate the median.
- Construct a frequency table for these results and draw a histogram on graph paper.
