A variable r r\,r was measured to the nearest whole number. 60 observations are given in the table below.
| rrr | 12 – 15 | 16 – 21 | 22 – 26 | 27 – 33 |
|---|---|---|---|---|
| Frequency | 11 | 15 | 20 | 14 |
A histogram was drawn, with bar areas proportional to frequency. The bar representing the 16 – 21 class has a width of 3 cm and a height of 2.5 cm.
Find the width and height of the bar representing the 22 – 26 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.