The journey times of 100 people travelling to a stadium are summarised below. Measurements were recorded to the nearest minute, so use continuous class boundaries when determining bar widths.
| Journey time (nearest minute) | Frequency |
|---|---|
| 0 - 7 | 6 |
| 8 - 11 | 18 |
| 12 - 17 | 36 |
| 18 - 20 | 27 |
| 21 - 25 | 13 |
A histogram was drawn and the bar representing the 8 - 11 class has a width of 3 cm and a height of 1.5 cm.
Find the width and height of the bar representing the 12 - 17 class.
Find the width and height of the bar representing the 18 - 20 class.
28 exam-style questions on Edexcel AS Level Maths Representations of Data, covering 3.1 Outliers, 3.2 Box Plots, 3.3 Cumulative Frequency, 3.4 Histograms, and 3.5 Comparing Data. Each one has a worked solution and a mark scheme showing where the marks go.