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Refer to Exercise 5. Additional pieces of yarn will be

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi ISBN: 9780073401331 38

Solution for problem 6SE Chapter 5

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 6SE

Refer to Exercise 5. Additional pieces of yarn will be sampled in order to improve the precision of the confidence interval. Which would increase the precision the most: sampling 50 additional pieces of yarn from the old batch, 50 additional pieces from the new batch, or 25 additional pieces from each batch?

Step-by-Step Solution:

Answer:

Step 1 of 1:

In this question, we are asked to improve the precision of the confidence interval while referring to exercise 5.

Which would increase the precision the most:

sampling 50 additional pieces of yarn from the old batch, 50 additional pieces from the new batch, or 25 additional pieces from each batch.

and

Here  and are variable.

Then 90% confidence interval for the difference  is,

Width of confidence interval =

Case 1: sampling 50 additional pieces of yarn from the old batch.

Hence the sample sizes are  and

The width of a confidence interval is , and...

Step 2 of 3

Chapter 5, Problem 6SE is Solved
Step 3 of 3

Textbook: Statistics for Engineers and Scientists
Edition: 4
Author: William Navidi
ISBN: 9780073401331

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Refer to Exercise 5. Additional pieces of yarn will be

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