A psychologist draws two pie charts showing how pupils at two schools travel to school. School A has 20 pupils in the study and School B has 200. In both pie charts, half of the circle is the slice for walking.
Explain why these two pie charts could mislead a reader.
173 exam-style questions on OCR GCSE Psychology 7.3 Analysing Research, covering 7.3.1 Types of Data, 7.3.2 Measures of central tendency, 7.3.3 Other descriptive statistics, 7.3.4 Tables, Charts and Graphs, 7.3.5 Reliability, 7.3.6 Validity and effects on validity, and 7.3.7 Sources of bias. Each one has a worked solution and a mark scheme showing where the marks go.