The distance travelled by 100 visitors to a festival is summarised below.
| Distance (nearest mile) | Frequency |
|---|---|
| 0 - 9 | 6 |
| 10 - 19 | 17 |
| 20 - 29 | 35 |
| 30 - 39 | 28 |
| 40 - 49 | 11 |
| 50 - 59 | 3 |
Using the class midpoints, you may use: ∑fx=2750\sum fx = 2750∑fx=2750 and ∑fx2=88725\sum fx^2 = 88725∑fx2=88725
Use linear interpolation to estimate the median distance.
Estimate the mean distance.
Estimate the standard deviation.
32 exam-style questions on Edexcel AS 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.