Understand ‘population’, ’sample’ and ‘census’, and comment on their advantages + disadvantages Understand advantages + disadvantages of ‘Simple random sampling’, ‘Systematic sampling’, ‘Stratified sampling’, ‘Quota sampling’ and ‘Opportunity sampling’ Define qualitative, Quantitative, discrete and continuous data + understand grouped data Understand large data set + how to collect data from it + identify types of data and calculate simple statistics