A variable m m\,m was measured to the nearest whole number. 72 observations are given in the table below.
| mmm | 40 – 44 | 45 – 51 | 52 – 55 | 56 – 62 |
|---|---|---|---|---|
| Frequency | 12 | 21 | 14 | 25 |
A histogram was drawn, with bar areas proportional to frequency. The bar representing the 45 – 51 class has a width of 2.8 cm and a height of 4.2 cm.
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.