An environmental health scientist wants to investigate the relationship between urban air quality and public health. They decide to use a correlational design to examine the relationship between daily average PM2.5\text{PM}_{2.5}PM2.5 particulate matter concentration and the daily number of respiratory-related hospital admissions in a specific metropolitan city over a one-year period.
Outline how the researcher could obtain secondary data to use as the measurement of the variable 'daily average PM2.5\text{PM}_{2.5}PM2.5 particulate matter concentration'.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.