A psychologist groups the reaction times of 30 pupils into equal intervals of 0.1 seconds. Which type of chart should be used to display these data?
A bar chart, because each interval can be treated as a separate category
A histogram, because the data are continuous and grouped into intervals
A pie chart, because the intervals add up to the whole group
A scatter diagram, because every pupil provides their own reaction time score
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.