A psychologist uses anonymised school records. For each pupil, the psychologist pairs the pupil's attendance percentage for the previous term with their score out of 50 on a reading assessment. On a scatter diagram, the points generally rise from left to right.
A headteacher concludes that higher attendance improves pupils' reading.
State the type of correlation shown on the scatter diagram.
Give one strength of using a correlation in this investigation.
Explain why the findings do not support the headteacher's conclusion.
139 exam-style questions on OCR GCSE Psychology 7.2 Doing Research, covering 7.2.1 Experiments, 7.2.2 Interviews, 7.2.3 Questionnaires (Surveys), 7.2.4 Observations, 7.2.5 Case Studies, and 7.2.6 Correlations. Each one has a worked solution and a mark scheme showing where the marks go.