An environmental scientist is investigating air pollution trends in a major city. To do this, they download a dataset from the national weather service website containing the daily mean temperature, recorded in degrees Celsius (∘C^\circ\text{C}∘C), and the daily mean particulate matter concentration, measured in micrograms per cubic metre (μg/m3\mu\text{g/m}^3μg/m3), recorded by a roadside monitoring station over the previous ten years.
Which of the following correctly identifies both the data source for the scientist's study and the type of data represented by the daily mean particulate matter concentration?
Primary and discrete
Primary and continuous
Secondary and discrete
Secondary and continuous
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.