Home > Maths > Data Handling > Sampling - Higher
Where a sample as far as possible reflects the whole population. This method is often used by market research companies.
Every member of a 'population' is tested.
Each member of a population is allocated a number (001, 002, 003...) and matched with a list of computer-generated numbers. Those which are matched are tested.
When testing pre-existing groups, a proportional representation of each group is tested.
Doesn't select totally random members of one population.
A school has 600 pupils. The number in each year group is shown below:
A stratified sample of 100 pupils is to be taken. How many pupils from each year group should be tested?