A developmental psychologist is investigating the screen-time habits of toddlers in a specific city. To obtain their participants, they get an official registry list of all families with children aged 1 to 31\text{ to }31 to 3 years from the local health authority. From this list, they use a random number generator to select 150 families to participate.
What term best describes the registry list of all families with children aged 1 to 31\text{ to }31 to 3 years?
target population
sampling frame
sample
sampling unit
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.