A student shows how many studies used each research method by drawing a line graph that joins the categories ‘interview’, ‘observation’ and ‘questionnaire’. The frequency axis has unequal intervals and neither axis is labelled.
Identify three problems with the student's graph.
72 exam-style questions on Edexcel GCSE Psychology 11.2 Data analysis, covering 11.2.1 Arithmetic and numerical computation, 11.2.2 Descriptive statistics, 11.2.3 Tables, charts and graphs, 11.2.4 Primary and secondary data, and 11.2.5 Qualitative and quantitative data. Each one has a worked solution and a mark scheme showing where the marks go.