National polls are often conducted by asking several thousand adults across the nation and using this data to infer the opinion of the nation's adults.

-Explain which set forms the population and which forms the sample. Give an example from a newspaper, from TV or from the Internet. Say the subject of the survey, the population, the sample, and the result.

Example: In a TV program a survey was carried out where 1000 citizens with the right to vote about the approval of the President's management participated. Their numbers dropped from 52% favorable and 42% unfavorable (6% expressed not having criteria to give an opinion) to 48% favorable and 49% unfavorable (3% did not favor any of the above). The sample is the 1000 voters who participated. The population is the citizens with the right to vote of the Nation.

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