Purchase Solution

Standard deviation, mean

Not what you're looking for?

Ask Custom Question

A union of restaurant and foodservice workers would like to estimate the mean hourly wage,µ, of foodservice workers in the U.S. The union will choose a random sample of wages and then estimate µ using the mean of the sample. What is the minimum sample size needed in order for the union to be 90% confident that its estimate is within $0.45 of µ ? Suppose that the standard deviation of wages of foodservice workers in the U.S. is about $2.15.

Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).

Can you please explain to me how to do this problem?

Purchase this Solution

Solution Summary

The solution examines standard deviation and means.

Purchase this Solution


Free BrainMass Quizzes
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.

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.