Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 7 - Estimates and Sample Sizes - Review - Technology Project - Page 371: d

Answer

Find the average of the 12th and 13th values in column 2, and find the average of the 487th and 488th values in column 2.

Work Step by Step

For this problem, the book asks us to use a program called STATDISK. In order to do this, first go to https://www.statdisk.org, which will allow you to download this program. The book then asks us to find $P_{2.5} $ and $P_{97.5}$. In order to do this (since we already arranged the second column in order from the lowest to the highest), find the average of the 12th and 13th values in column 2, and find the average of the 487th and 488th values in column 2. This will be your confidence interval.
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