## Elementary Statistics (12th Edition)

Published by Pearson

# Chapter 7 - Estimates and Sample Sizes - 7-4 Estimating a Population Standard Deviation or Variance - Basic Skills and Concepts: 19

#### Answer

33218, which is not practical at all.

#### Work Step by Step

To be 99% confident that s is witin 1% of $\sigma$ by using the table, the corresponding sample size is: 33218, which is really big and hence not practical at all.

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