Two analysts draw histograms from the same continuous data. One uses equal 5-unit classes; the other uses narrow classes near the mode and wide classes in the tails.
Explain why both histograms can be mathematically valid.
Explain two ways the choice of classes can affect interpretation.
State two principles for a defensible choice of classes.
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.