Determine margin of error of three surveys based on sample size and verify. First Survey: According to a recent Gallup poll, about 60% of all American adults owned a cell phone at the time of the poll. The results are based on telephone interviews with a randomly selected national sample of 804 adults, 18 years and older, conducted March 30April 2, 2001. The 95% margin of error was reported to be 3.5%. Second Survey: In march 1, 2011 PBS results said that 69% of voters oppose congressional elimination of government funding with margin of error ± 4.5%. The total number of registered voters is 494. Third Survey: A recent poll reported that 62% of all college students among 625 believe there is extra-terrestrial life. The 95% margin of error for the poll was 4%.

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Chapter 6.D, Problem 55E

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Determine margin of error of three surveys based on sample size and verify.

First Survey:

According to a recent Gallup poll, about 60% of all American adults owned a cell phone at the time of the poll. The results are based on telephone interviews with a randomly selected national sample of 804 adults, 18 years and older, conducted March 30April 2, 2001. The 95% margin of error was reported to be 3.5%.

Second Survey:

In march 1, 2011 PBS results said that 69% of voters oppose congressional elimination of government funding with margin of error ± 4.5%. The total number of registered voters is 494.

Third Survey:

A recent poll reported that 62% of all college students among 625 believe there is extra-terrestrial life. The 95% margin of error for the poll was 4%.

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