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: the median distance is 26.1, the mean distance is 26.51 and the standard deviation is 101.5624\sqrt{101.5624}101.5624
Use linear interpolation to verify that the median distance is 26.1.
Use the mean distance to calculate ∑fx\sum fx∑fx.
Use the standard deviation to calculate ∑fx2\sum fx^2∑fx2.
96 exam-style questions on Edexcel A Level Maths Measures of Location and Spread, covering 2.1 Measures of Central Tendency, 2.2 Other Measures of Location, 2.3 Measures of Spread, 2.4 Variance and Standard Deviation, and 2.5 Coding. Each one has a worked solution and a mark scheme showing where the marks go.