The masses of 100 parcels at a delivery depot are summarised below. Masses were recorded to the nearest kilogram, so use continuous class boundaries when determining bar widths.
| Mass (nearest kg) | Frequency |
|---|---|
| 0 - 4 | 9 |
| 5 - 10 | 24 |
| 11 - 14 | 28 |
| 15 - 17 | 30 |
| 18 - 22 | 9 |
A histogram was drawn and the bar representing the 5 - 10 class has a width of 3 cm and a height of 2 cm.
Find the width and height of the bar representing the 11 - 14 class.
Find the width and height of the bar representing the 15 - 17 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.