9709 P6 - Nov 2002 - Q7
2503
The weights in kilograms of two groups of 17-year-old males from country P and country Q are displayed in the following back-to-back stem-and-leaf diagram. In the third row of the diagram, 4 | 7 | 1 denotes weights of 74 kg for a male in country P and 71 kg for a male in country Q.
| Country P | Country Q | |
|---|---|---|
| 5 | 1 5 | |
| 6 | 2 3 4 8 | |
| 9 8 7 6 4 | 7 | 1 3 4 5 6 7 7 8 8 9 |
| 8 8 6 6 5 3 | 8 | 2 3 6 7 7 8 8 |
| 9 7 7 6 5 5 5 4 2 | 9 | 0 2 2 4 |
| 5 4 4 3 1 | 10 | 4 5 |
- Find the median and quartile weights for country Q.
- You are given that the lower quartile, median and upper quartile for country P are 84, 94 and 98 kg respectively. On a single diagram on graph paper, draw two box-and-whisker plots of the data.
- Make two comments on the weights of the two groups.
