A regional transit authority wishes to investigate passenger satisfaction with their new contactless ticketing system. They decide to survey a stratified sample of 180 daily commuters from four different train lines (the Northern, Eastern, Southern, and Western lines). The daily ridership numbers of these lines vary significantly, with some lines being heavily congested and others having much lower passenger volumes.
Explain how the transit authority could obtain a stratified sample of 180 daily commuters from these four train lines.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 100 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.