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Estimating the percentage of youngsters between 16-0 driving

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A survey in Australia found that 21% of all Americans aged 16 to 20 drove under the influence of drugs or alcohol. A similar survey is planned for New Zealand. How large a sample is required if they want a 95% confidence interval to be accurate within 3.5%?

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This question is based on Statistics and it is about estimating the percentage of youngsters between 16-0 driving under drugs or alcohol. The test is to be conducted in New Zealand and the sample size is to be estimated.

Reference no: EM13828911

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