define population

define census

define sample

what is the advantages and disadvantages of a census?

what is the advantages and disadvantages of a sample?

define sampling unit

define what sampling frame is

explain simple random sampling

explain systematic sampling

explain stratified sampling

what are the advantages and disadvantages of simple random sampling?

what are the advantages and disadvantages of systematic sampling?

what are the advantages and disadvantages of stratified sampling?

describe quota sampling

describe opportunity sampling

what are the advantages and disadvantages of quota sampling?

what are the advantages and disadvantages of opportunity sampling?