An oceanographer, Dr. Aris, is investigating the linear relationship between seawater salinity levels SSS and dissolved oxygen concentration DDD across 18 hydrothermal vent samples. After performing her calculations, she determines the product moment correlation coefficient (PMCC) for the dataset.
Which of the following statements best describes her calculated result of −1.42-1.42−1.42?
202 exam-style questions on Edexcel A Level Maths Regression, Correlation and Hypothesis Testing, covering 1.1 Exponential Models, 1.2 Measuring Correlation, and 1.3 Hypothesis Testing for Zero Correlation. Each one has a worked solution and a mark scheme showing where the marks go.