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 8 - Samples, Sampling Distributions, and Confidence Intervals - Problems - Page 168: 8.26


It is the value of each sample standard deviation that explains why the widths of the 20 confidence intervals will not always be equal.

Work Step by Step

The widths of the 20 confidence intervals are not always equal. When multiple random samples are taken from a population, the means will often be different.
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