An educational researcher noticed that the test scores of individual students in Class A varied enormously, whereas there was very little variation in the average scores between the 6 schools in Sector B. She decided to calculate a measure of dispersion for the scores in each group.
Name a measure of dispersion the researcher could use.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.