Omar records the CO emission of each of 200 cars, grouped into five classes of unequal width. He presents the data as a pie chart, with one sector for each class.
Give one reason why a pie chart is not a suitable way to present these data, and name a more suitable diagram.
State one feature of the distribution that your suggested diagram would show but the pie chart would not.
244 exam-style questions on AQA A Level Maths 2.2 L: Data presentation and interpretation, covering 2.2.1 Single-variable data diagrams, 2.2.2 Scatter diagrams and correlation, 2.2.3 Central tendency, variation and standard deviation, 2.2.4 Outliers and cleaning data, and 2.2 L: Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.