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Question 87
Question 87 of 215
3 points
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As the world marked Earth Day's 45th anniversary two days ago, Gallup surveys in 153 countries highlight a major environmental problem that affects people in
developed and developing nations - air quality. One-quarter of the world's adults are critical of the air quality in their communities. According to the findings, the most
dissatisfied are the residents of Hong Kong. Gallup reports, with 95% confidence and a margin of error of 3%, that 70% of adults in Hong Kong are dissatisfied. The
results for Hong Kong are based on a simple random sample of approximately 1,100 adults. What sample size would be needed for a new study that wants to lower the
margin of error to 1%?
Sample size must be at least n = [1]
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MAY
A
6
tv
MacBook Pro
A
Question 87 of 215
今
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