4 The following back-to-back stem-and-leaf diagram shows the times to load an application on 61 smartphones of type \(A\) and 43 smartphones of type \(B\).
(7)
| Type \(A\) | | Type \(B\) |
| 9766433 | 2 | 1358 |
| 5544222 | 3 | 044566667889 |
| 9988876643220 | 4 | 0112368899 |
| 655432110 | 5 | 25669 |
| 9730 | 6 | 1389 |
| 874410 | 7 | 57 |
| 7666533210 | 8 | 1244 |
| 86555 | 9 | 06 |
Key: 3 | 2 | 1 means 0.23 seconds for type \(A\) and 0.21 seconds for type \(B\).
- Find the median and quartiles for smartphones of type \(A\).
You are given that the median, lower quartile and upper quartile for smartphones of type \(B\) are 0.46 seconds, 0.36 seconds and 0.63 seconds respectively.
- Represent the data by drawing a pair of box-and-whisker plots in a single diagram on graph paper.
- Compare the loading times for these two types of smartphone.