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Media survey

In 2007, a Gallup Poll conducted face- to-face interviews with 1006 adults in Saudi Arabia, aged 15 and older, asking them questions about how they get in- formation. Among them was the question: "Is international television very important in keeping you well-informed about events in your country?" Gallup reported that 82% answered "yes" and noted that at 95% confidence there was a 3% margin of error and that "in addition to sampling error, question wording and practical difficulties in con- ducting surveys can introduce error or bias into the find- ings of public opinion polls."

a) What kinds of bias might they be referring to?

b) Do you agree with their margin of error? Explain.

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