The heights of 100 sunflowers in a garden are summarised below. Heights were recorded to the nearest centimetre, so use continuous class boundaries when determining bar widths.
| Height (nearest cm) | Frequency |
|---|---|
| 30 - 39 | 8 |
| 40 - 44 | 20 |
| 45 - 51 | 49 |
| 52 - 55 | 20 |
| 56 - 60 | 3 |
A histogram was drawn and the bar representing the 40 - 44 class has a width of 4 cm and a height of 1.6 cm.
Find the width and height of the bar representing the 45 - 51 class.
Find the width and height of the bar representing the 52 - 55 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.