A vehicle testing centre wants to know what its 900 customers think about its opening hours. The manager decides to ask every one of the 900 customers rather than to take a sample.
Write down the name given to a survey of every member of a population.
Give one disadvantage of surveying every customer rather than taking a sample.
28 exam-style questions on AQA A Level Maths 2.1 K: Statistical sampling, covering 2.1.1 Populations, samples and sampling techniques. Each one has a worked solution and a mark scheme showing where the marks go.