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Confidence Interval of a Random Sample

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In a random sample of 225 students at a university, 180 stated that they were nonsmokers. Based on this sample, compute a 95% confidence interval for the proportion of all students at the university who are nonsmokers.

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

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Solution Summary

This solution computes a 95% confidence interval for a particular proportion of given sample.

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The required confidence interval is (0.75, 0.85).

Please refer to the EXCEL ...

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