# Sample size for estimating a population proportion

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In a survey of 262 smokers, 189 smokers considered themselves addicted to cigarettes.

A) If you are wanting to estimate, with 98% confidence, the proportion of smokers who are addicted to cigarettes and your estimate must be accurate within 4% of the population proportion. Find the sample size needed using the study above.

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##### Solution Summary

This solution shows how to determine the sample size necessary to construct a confidence interval for a population proportion when the margin of error must be within a given amount and the interval must have a given level of confidence.

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In a survey of 262 smokers, 189 smokers considered themselves addicted to cigarettes.

The previous study showed that the estimate of p is

A) If you want to estimate, with 98% confidence, the proportion of smokers who are addicted to cigarettes and your estimate must be accurate within 4% of the population proportion. Find ...

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