7 The masses, in grams, of components made in factory \(A\) and components made in factory \(B\) are shown below.
| Factory \(A\) | 0.049 | 0.050 | 0.053 | 0.054 | 0.057 | 0.058 | 0.058 |
| 0.059 | 0.061 | 0.061 | 0.061 | 0.063 | 0.065 | |
| Factory \(B\) | 0.031 | 0.056 | 0.049 | 0.044 | 0.038 | 0.048 | 0.051 |
| 0.064 | 0.035 | 0.042 | 0.047 | 0.054 | 0.058 | |
- Draw a back-to-back stem-and-leaf diagram to represent the masses of components made in the two factories.
- Find the median and the interquartile range for the masses of components made in factory \(B\).
- Make two comparisons between the masses of components made in factory \(A\) and the masses of those made in factory \(B\).