A cognitive psychologist wants to conduct an experiment to study the effect of a 15-minute scheduled afternoon micro-nap on the alertness levels of employees at a financial consultancy firm called 'Nova Analytics'. The firm has a total of 150 employees consisting of 90 junior analysts, 45 senior analysts, and 15 partners, aged between 21 and 55.
Evaluate the use of stratified sampling in this study.
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.