A university course has 96 first-year, 84 second-year and 60 third-year students. A sample of 40 students is to be stratified by year group.
Calculate the number to select from each year group.
State how the students should be chosen within each year group.
8 exam-style questions on CCEA A Level Maths 2.4.3 Statistical sampling. Each one has a worked solution and a mark scheme showing where the marks go.