Purchase Solution

Confidence Intervals - Proportion

Not what you're looking for?

Ask Custom Question

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?

Purchase this Solution

Solution Summary

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

Solution Preview

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

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

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

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

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.