Which of the following correlation coefficients indicates the strongest relationship between two variables?
+0.85+0.85+0.85
−0.92-0.92−0.92
+0.09+0.09+0.09
−0.78-0.78−0.78
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.