# Confidence Intervals - Proportion

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A manufacturer of golf equipment wishes to estimate the number of left-handed golfers.

How large of a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 3%?

A previous study indicates that the proportion of left-handed golfers is 11%. How large of a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 3%?

What is the best way of going about this problem?

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A previous study indicates that the proportion of left-handed golfers is 11%. How large of a sample ...

#### Solution Summary

This solution calculates the size of a sample with a given confidence interval.

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