A membership list contains 600 names in alphabetical order. A systematic sample of size 50 is taken.
Calculate the sampling interval.
A random starting position of 7 is used. Write down the next two positions selected.
State why choosing the starting position at random is important.
36 exam-style questions on OCR (MEI) A Level Maths 2.1 Sampling, covering 2.1.1 Population and sample, 2.1.2 Samples to make informal inferences, 2.1.3 Random sampling, 2.1.4 Variety of sampling techniques, 2.1.5 Select or evaluate sampling techniques, and 2.1 Sampling. Each one has a worked solution and a mark scheme showing where the marks go.