A marine biologist studying the relationship between sea surface temperature (TTT, in ∘C^\circ\text{C}∘C) and the population density of a certain cold-water kelp species (DDD, in plants/m2\text{m}^2m2) calculates a product-moment correlation coefficient of r=−0.68r = -0.68r=−0.68.
Which of the four scatter diagrams in the grid below best represents this correlation coefficient?
Scatter diagram A
Scatter diagram B
Scatter diagram C
Scatter diagram D
Research methods Questions
Practise AQA A Level Psychology Research methods with exam-style questions for A Level Psychology. 100 questions covering Experimental method, Observational techniques, Self-report techniques, Correlations, Content analysis (A-level only), Case studies (A-level only), Scientific processes, Data handling and analysis, and Inferential testing (A-level only), matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.