A Gallup poll asked “Do you think the U.S. should take the leading role in world

Question

A Gallup poll asked “Do you think the U.S. should take the leading role in world affairs, take a major role but not the leading role, take a minor role, or take no role at all in world affairs?” Gallup’s report said, “Results are based on telephone interviews with 1102 U.S. adults, aged 20 and older, conducted Feb. 9-12, 2004. Please show all your work and answers in the spaces provided.

a) What is the population for this sample survey?

b) What is the sample size for this sample survey?

c) What type(s) of bias might have occurred due to this being a poll obtained via telephone? Explain why these type(s) of bias are ba

Explanation / Answer

a) Population of this sample survey is U.S citizens of aged 20 and older .

b) the sample size for this sample survey is 1102 U.S adults , aged 20 and older.

c) The first bias can be seen on such telephonic interview is preference bias. May be researcher is biased for few regions people.

Second one is unanswering the call or incomplete answering the questions.

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