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# 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.

##### 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 ...

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.