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

2. 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.