A quality control manager at a manufacturing plant is designing a sampling scheme to monitor the defect rate of components. Which of the following describes a non-probability sampling method?
Every 50th50^{\text{th}}50th component is selected from the production line, starting from a randomly chosen component between 111 and 505050.
The daily production is divided into three shifts (morning, afternoon, night), and a random number generator is used to select a sample from each shift proportional to the shift's production size.
Technicians are instructed to collect the first 100100100 components produced after 09:00 on a Monday because they are the most accessible.
Each component produced during the week is assigned a unique five-digit ID, and a computer database randomly selects 100100100 of these IDs where every ID has an equal chance of selection.
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.