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There are 15 numbers on a list, and the mean is 25. The

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

Solution for problem 7SE Chapter 1

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 7SE

Problem 7SE

There are 15 numbers on a list, and the mean is 25. The smallest number on the list is changed from 12.9 to 1.29.

a. Is it possible to determine by how much the mean changes? If so, by how much does it change?

b. Is it possible to determine the value of the mean after the change? If so, what is the value?

c. Is it possible to determine by how much the median changes? If so, by how much does it change?

d. Is it possible to determine by how much the standard deviation changes? If so, by how much does it change?

Step-by-Step Solution:

Answer :

Step 1 of 4 :

Given,

We have the list of 15 members, mean is 25. The smallest number on the list is changed from 12.9 to 1.29.

  1. The claim is to find how much the mean is changing

It is possible to determine the how much mean changes.

  Mean after the change =

                                      =  +

                                     =    - 0.774

The mean value is negative.

The mean decreases by 0.774.


Step 2 of 3

Chapter 1, Problem 7SE is Solved
Step 3 of 3

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

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There are 15 numbers on a list, and the mean is 25. The