Basic Statistics: Tales of Distributions 10th Edition

Published by Cengage Learning
ISBN 10: 0-49580-891-1
ISBN 13: 978-0-49580-891-6

Chapter 9 - Hypothesis Testing and Effect Size: One-Sample Designs - Problems: 9.27


The correlation coefficient r was calculated for data relating per capita cigarette consumption and male death rate, as measured 20 years later, in N=11 countries. The value of r was .74

Work Step by Step

Use the table, for the degrees of freedom df = N - 2 = 9. Move to the right, and find that the r value of .7348 is associated with a p value of .0.1. This means that an outcome this unusual would happen only about 1 time in 100 (if there were really no relationship between the 2 variables), which is unusual.
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