Module 4 (M4) - Handling data - Stratified sampling Stratified sampling selects a sample representative of different groups. If groups are different sizes the number selected will be proportional ...

Example Jimmy has the following list of random numbers: 3 6 9 0 1 3 7 4 3 2 2 9 1 3 8 5 4 1 2 7 He wants to use them to choose four people from a list of 60. First he groups the numbers into pairs ...