opinion poll
A representative sample is a randomly selected subset of the population.
a process of systematically selecting representation elements of a population
the one child policy.
Europe(The Spanish) began to systematically wipe out the indigenous population as they moved west such as the Incas ,Aztecs and the Mayans.
"Respondents' population do not use" is the correct form. "Do not use" agrees with the plural noun "population" because it indicates that multiple individuals within the population do not use something.
different samples of respondents from the population complete the survey over a time period
About one representative for every 30K people
.representative
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It is important for a sample to be representative, so that the whole population's view is counted, and not biased by one particular group within the population.
That the key characteristics of the population are reflected in the sample.
the sampled population includes all people whom are included in the sample, the targeted population is what the statistics practitioner is targeting or questioning