A clinic numbers its 480 patient records from 001 to 480. A computer generates 25 different random integers from 1 to 480, and the corresponding records are selected.
a.
Name the sampling technique.
[1]
b.
Explain why it is random.
[1]
Markscheme
2.4.3 Statistical sampling Questions
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.