34. Media survey. In 2007, a Gallup Poll conducted faceto-

face interviews with 1006 adults in Saudi Arabia, aged 15 and older, asking them questions about how they get information.

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 conducting surveys can introduce error or bias into the findings of public opinion polls.”

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

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