Thanks for visiting NZMaths.
We are preparing to close this site and currently expect this to be in June 2024
but we are reviewing this timing due to the large volume of content to move and
improvements needed to make it easier to find different types of content on
Tāhūrangi.
We will update this message again shortly.
For more information visit https://tahurangi.education.govt.nz/updates-to-nzmaths
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)
