Explore BrainMass

Explore BrainMass

    Determining the Required Sample Size

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1,000. A random sample of 50 individuals resulted in an average income of $15,000. What sample size would the economist need to use for a 95% confidence interval if the width of the interval should not be more than $100?

    © BrainMass Inc. brainmass.com December 15, 2020, 10:47 pm ad1c9bdddf

    Solution Summary

    This solution provides a brief, but complete explanation of how to calculate sample size. All required calculations are included.