A researcher wanted to investigate whether task concentration is affected by the volume of background office noise (low volume vs. high volume).
The researcher required a stratified sample of 30 participants. They obtained this sample from a technology startup employing 90 software engineers and 60 marketing staff.
Participants were asked to complete a complex coding-deciphering task on a computer. Individual performance was measured by counting the number of errors made during a 10-minute session.
There were two conditions in the study, Condition A and Condition B:
Explain how the researcher would have obtained the software engineers for their stratified sample. Show your calculations.
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.