A time ttt, in minutes, was measured to the nearest whole minute for each of 40 customers. The results are given in the table below.
| ttt | 30 - 37 | 38 - 42 | 43 - 49 | 50 - 54 |
|---|---|---|---|---|
| Frequency | 16 | 10 | 7 | 7 |
A histogram was drawn and the bar representing the 30 - 37 class has a width of 3 cm and a height of 4 cm.
Find the width and height of the bar representing the 38 - 42 class.
Find the width and height of the bar representing the 43 - 49 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.