A psychologist wants to obtain a sample of 50 participants from a hospital database containing 1000 patients. She obtains an alphabetical list of all patients, uses a random number generator to select a starting point between 1 and 20, and then selects every 20th20\text{th}20th patient on the list thereafter.
Which of the following correctly identifies this sampling technique and its classification?
Systematic sampling, which is a probability sampling method
Systematic sampling, which is a non-probability sampling method
Stratified sampling, which is a probability sampling method
Quota sampling, which is a non-probability sampling method
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.