Random Sampling
This is where every nth person is chosen for example and n is random number, also with a big population it could be very costly and tame wasting
Stratisfied sampling
This is when a specific group that has spersific charicteristics needs to be servayed.
Cluster
This involves a small group that represent a larger group
Systermatic
This is where a set approch is done eg every hundreth person
Convenience Sampling
This is the most frequently used it is just asking anyone in the desired group
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