The distance travelled by 100 people to an event is summarised below.
| Distance (nearest mile) | Frequency |
|---|---|
| 0 – 9 | 4 |
| 10 – 19 | 19 |
| 20 – 29 | 41 |
| 30 – 39 | 26 |
| 40 – 49 | 9 |
| 50 – 59 | 1 |
You may use: ∑fx=2651\sum fx = 2651∑fx=2651 and ∑fx2=80434.25\sum fx^2 = 80434.25∑fx2=80434.25
Use linear interpolation to estimate the median distance.
Estimate the mean distance.
Estimate the standard deviation.