9709 P53 - Jun 2020 - Q6
2385
The annual salaries, in thousands of dollars, for 11 employees at each of two companies A and B are shown below.
| Company A | 30 | 32 | 35 | 41 | 41 | 42 | 47 | 49 | 52 | 53 | 64 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Company B | 26 | 47 | 30 | 52 | 41 | 38 | 35 | 42 | 49 | 31 | 42 |
- Represent the data by drawing a back-to-back stem-and-leaf diagram with company A on the left-hand side of the diagram.
- Find the median and the interquartile range of the salaries of the employees in company A.
- A new employee joins company B. The mean salary of the 12 employees is now $38,500. Find the salary of the new employee.
