A variable y y\,y was measured to the nearest whole number. 40 observations are given in the table below.
| yyy | 10 – 19 | 20 – 24 | 25 – 28 | 29 – 30 |
|---|---|---|---|---|
| Frequency | 12 | 8 | 16 | 4 |
A histogram was drawn and the bar representing the 10 – 19 class has a width of 2.4 cm and a height of 2.4 cm.
Find the width and height of the bar representing the 20 – 24 class.
160 exam-style questions on Edexcel A 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.