Elena records the journey times in minutes of cyclists completing a short route.
| Time (minutes) | Frequency |
|---|---|
| 0<t≤50 < t \leq 50<t≤5 | 4 |
| 5<t≤105 < t \leq 105<t≤10 | 11 |
| 10<t≤1510 < t \leq 1510<t≤15 | 14 |
| 15<t≤2015 < t \leq 2015<t≤20 | 13 |
| 20<t≤3020 < t \leq 3020<t≤30 | 8 |
Use linear interpolation to estimate the median journey time.
Estimate the mean journey time.
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.