Sampling Flashcards
What is non probability sampling
Non random sampling, can’t estimate chance of selection
What is simple random sampling
Random select everyone in pop
What is stratified random sampling
Groups according to characteristics and then selected randomly
What is cluster sampling
Random selection of larger units which ps are then randomly selected from
What is systemic sampling
Random selection at predetermined intervals
What is probability sampling
Sampling which is designed to be unbiased and give everyone who meets the criteria a chance to be selected
. Simple random
. Stratified random
. Cluster
. Systematic random
Simple randomisation
. Tossing a coin
. Random number tables
Block randomisation
. Keep numbers in each group close
Stratified randomisation
. Bla ace characteristics across arms of trial
