Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - 8-5 Testing a Claim About a Standard Deviation or Variance - Basic Skills and Concepts - Page 429: 2


a) Both require normal distributions, but the mean requires a large sample. b) Normal Quartile Plot

Work Step by Step

a) Both are impacted by a normal distribution, but the test involving standard deviation does not need a large sample size, because standard deviation already considers sample sizes. b) A normal quartile plot is the best in this situation, because it shows whether or not the distribution is normal.
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