A variable yyy, measured to the nearest integer, has frequencies 13, 7, 15 and 5 in the classes 10–19, 20–24, 25–28 and 29–30. On a printed histogram, the 10–19 bar is 2.5 cm wide and 2.6 cm high.
Find the printed width and height of the 20–24 bar.
Find the printed width and height of the 25–28 bar.
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.