One way to choose a representative sample in a survey is to

A representative sample is one that translates data into relevant information about the population of a given location. In order to be effective in the research, it is important to define essential criteria in the choice of sampling; the ideal would be to randomly select a group of people whose individual characteristics represent the collective characteristics of a given population.

answer; observation learning;

answer; coal reserves in the u.s are far greater than petroleum reserves;