A researcher groups incomes into classes ending with the open class “£80 000 or more” and wants to draw a histogram.
Explain why the final bar cannot be drawn uniquely.
Suggest two defensible remedies.
Explain why silently assigning an arbitrary width may distort interpretation.
105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, and 2.2 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.