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Margin of Error

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A Gallup Poll of 1002 adults found that 25% of the respondents said that their household had experienced a crime in the past year. Among respondents aged 18 to 29 years, 43% had been victims of a crime. Gallup says, "For results based on the total sample of national adults, one can say with 95% confidence that the margin of sampling error is + 3 percentage points."

Is the margin of error for adults 18 to 29 smaller or larger than +3 percentage points? Why?

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This solution calculates the margin of error.

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#2 :A Gallup Poll of 1002 adults found that 25% of the respondents said that their household had experienced a crime in the past year. Among respondents aged 18 to 29 years, 43% had been victims of a crime. Gallup says, "For results based on the total sample of national adults, one can say with ...

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