A transport company employs 418 drivers, 267 maintenance staff and 115 office staff. It wants a stratified random sample of 73 employees, using job type as the stratum.
Calculate a suitable number to select from each job type.
Describe how the 73 employees should then be selected.
36 exam-style questions on CCEA A Level Maths 2.4 Statistical sampling, covering 2.4.1 Statistical sampling, 2.4.2 Statistical sampling, 2.4.3 Statistical sampling, and 2.4.4 Statistical sampling. Each one has a worked solution and a mark scheme showing where the marks go.