Mathematics, 20.11.2019 07:31 Callmetay24
Many people think that a national lobby's successful fight against gun control legislation is reflecting the will of a minority of americans. a previous random sample of 4000 citizens yielded 2250 who are in favor of gun control legislation. how many citizens would need to be sampled if a 99% confidence interval was desired to estimate the true proportion to within 5%?
611
690
653
664
Answers: 3
where 
z is the corresponding z-score for 99% confidence level (2.575)ME is the margin of error in the estimation (5% or 0.05)
≈652.7
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