Stratified sampling

A method of sampling in which the population is split into non-overlapping groups (the strata), with the groups having different characteristics that are known for the whole population. A simple random sample is taken from each stratum.

Example

Consider obtaining a sample of students from a secondary school with students from year 9 to year 13. This year levels are suitable strata, and the simple random samples taken from each year level from the sample.

Curriculum achievement objectives references

Statistical investigation: Levels 7, 8

The quality of the images on this page may vary depending on the device you are using.