Purchase Solution

Inferences about Two Population Variances on Earnings

Not what you're looking for?

Ask Custom Question

The standard deviation in the 12-month earnings per share for 10 companies in the airline industry was 4.27 and the standard deviation in the 12-month earnings per share for 7 companies in the automotive industry was 2.27 (Business Week, August 14, 2000). Conduct a test for the equal variances at a=.05. What is your conclusion about the variability in earnings per share for the airline industry and the automotive industry?

Purchase this Solution

Solution Summary

The solution examines the standard deviation in the 12-month earnings per share for 10 companies in an airline industry.

Purchase this Solution


Free BrainMass Quizzes
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

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.

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.