StatisticsCode 4040
Data and its collection
What this topic asks you to be able to do
- The basic thinking behind sampling, including what is meant by population, census, sample and representative sample
- The different ways of choosing a sample, including simple random, systematic, stratified and quota sampling
- Use of random numbers
- Bias: the ways it comes about and the means of avoiding it
- The main ideas behind surveys, including how closed and open questions are used in a questionnaire
- The different kinds of data and variables, including the meaning of qualitative, quantitative, discrete and continuous