A researcher wishes to investigate the attitudes of UK primary school teachers towards the integration of artificial intelligence (AI) tools in classroom lesson planning. Which of the following sampling methods will provide the most representative sample of the target population?
A sample of 150150150 primary school teachers who volunteer by responding to an invitation posted on a popular UK educational technology blog
A sample of 150150150 primary school teachers selected randomly from staff directories across twenty schools in five different regions of the UK
A sample of 150150150 primary school teachers currently employed within a single large multi-academy trust in Greater London
A sample of 150150150 trainee primary school teachers currently completing their postgraduate teacher training at a university in the North West
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.