SAMPLING

population

it is whatever group you happen to be interested in

census

it is obtained by collecting information about each member of a population

sample

it is a small group taken from the population. it represents the whole population

respondents

they are the people who answer the questionnaire. they are part of the population

sampling frame

it refers to the list of people from which the sample is taken, it should be comprehensive, complete, and up to-date

sampling techniques

it is a method by which the researcher can derive a sample form a population

sampling

it is the process of choosing respondents. it helps make the study fair and accurate

probability sampling

it means everyone has an equal chance of being selected

non-probability sampling

it means not everyone has ta chance to be selected

availability, judgment, convenience

what are the selection bases of non-probability sampling?

simple random, systematic, stratified, cluster, random route

what are five probability sampling techniques?

convenience, purposive, quota, snowball, voluntary

what are five non-probability sampling techniques?

simple random

equal independent chance of being selected (wheel of names, draw lots, etc.)

systematic

select every k^th member from a list (interval)

stratified

divides using subgroups or strata and randomly sample from each group

cluster

divide population into clusters and randomly select a cluster

random route

field-based sampling, select respondents along a randomly chosen route (door-to-door)

convenience

easy to access, easy to reach respondents

purposive

judgmental, choose respondents based on specific qualities