Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 7 - Confidence Intervals and Sample - 7-4 Confidence Intervals for Variances and Standard Deviations - Exercises 7-4 - Page 404: 1

Answer

Chi-square distribution is used when computing confidence intervals for variances and standard deviations, because chi-square distributions can give the minimum value of variations. For example, when shoes are manufactured, it is important to keep the variations of the diameters of the shoes as small as possible.

Work Step by Step

Chi-square distribution is used when computing confidence intervals for variances and standard deviations, because chi-square distributions can give the minimum value of variations. For example, when shoes are manufactured, it is important to keep the variations of the diameters of the shoes as small as possible.
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