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 - Beyond the Basics - Page 431: 20



Work Step by Step

k=35, z=-1.645, hence using the given formula: $X^2=k(1-\frac{2}{9k}+z\sqrt{\frac{2}{9k}})^3=35(1-\frac{2}{9\cdot35}-1.645\sqrt{\frac{2}{9\cdot35}})^3=22.463.$ Hence we can see that this value is really close to the value we got by using STATDISK and Minitab, even closer than the value we got in the previous exercise.
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