©G Dear 2008 – Not to be sold/Free to use General Mathematics Preliminary Collecting Data Sampling Stage 6 - Year 11 Press Ctrl-A ©G Dear 2008 – Not to be sold/Free to use

Types of Survey Sampling (1/1) Random Sample – chance is the only factor in deciding who participates. [=INT(1000*RAND()) if you use a spreadsheet] Stratified Sample – the sample taken is chosen so that it has the same characteristics as the population. Systematic Sample – There is a method for deciding who participates in the sample.