Purchase Solution

Sample size for estimating a population mean

Not what you're looking for?

It is believed that the range of hourly wages paid to auto mechanics in a large city is \$9 (range approx. = 4sigma-squared). If we assume that hourly wages are approximately normally distributed, how large a sample is necessary so that with probability 0.99 the sample mean will be within one dollar of the true average hourly wages?

Solution Summary

This solution shows how to determine the sample size necessary to construct a confidence interval for a population mean when the margin of error must be within a given amount and the interval must have a given level of confidence.

Solution Preview

Please see the attached Word document.

Find Sample Size
1. It is believed that the range of hourly wages paid to auto mechanics in a large city is \$9 (range approx. = 4sigma-squared). If we assume that hourly wages are approximately normally distributed, how large a sample is necessary so that with probability 0.99 the sample mean will be within one dollar of the true average hourly wages?

First ...

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.

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.