A leasing company has 2400 cars on its fleet. The company wants to know the mean annual mileage of the cars on its fleet. Every car has a mileage recorded on the company's database.
State whether finding the mean annual mileage of all 2400 cars is a census or a sample, and give a reason for your answer.
Give one advantage and one disadvantage of using all 2400 cars rather than a sample of 200 of them.
The company later wants to know what its drivers think of the cars. Explain why a census is less suitable for this second investigation.
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.