An app development company wishes to investigate user satisfaction following a major software update. The company has active users across four distinct subscription tiers: Free, Standard, Premium, and Enterprise. The number of active users in each tier varies significantly.
Explain how the company could obtain a stratified sample of 150 active users from these four subscription tiers.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.