A researcher wants to select a systematic sample of 24 employees from an alphabetical list of 240 staff members at a logistics company. Which of the following procedures correctly describes how this sample should be obtained?
Divide the staff into departments (e.g., Administration, Warehouse, Transport) and select a number of participants from each department proportional to its size in the company, totaling 242424.
Send an email invitation to all 240240240 employees and select the first 242424 who reply to the survey.
Assign each of the 240240240 staff members a unique number from 111 to 240240240, then use a computer program to generate 242424 random numbers to select the participants.
Select a starting name randomly from the first 101010 names on the alphabetical list, and then select every 10th10\text{th}10th name thereafter until 242424 participants are chosen.
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.