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Use a normal probability plot to assess whether the sample

Fundamentals of Statistics | 4th Edition | ISBN: 9780321838704 | Authors: Michael Sullivan,III ISBN: 9780321838704 30

Solution for problem 11AYU Chapter Chapter 7.3

Fundamentals of Statistics | 4th Edition

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Fundamentals of Statistics | 4th Edition | ISBN: 9780321838704 | Authors: Michael Sullivan,III

Fundamentals of Statistics | 4th Edition

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Problem 11AYU

Use a normal probability plot to assess whether the sample data could have come from a population that is normally distributed. O-Ring ThicknessĀ A random sample of O-rings was obtained, and the wall thickness (in inches) of each was recorded.

0.276

0.274

0.275

0.274

0.277

0.273

0.276

0.276

0.279

0.274

0.273

0.277

0.275

0.277

0.277

0.276

0.277

0.278

0.275

0.276

Step-by-Step Solution:

Answer :

Step 1 :

From the Excel

> arrange x - values in ascending order

> calculate , i is the position of the data

> find z score for each

> plot x - values on the horizontal axis and the corresponding z-score on the vertical axis

...

x

position

=

Z - value

0.273

1

0.030864

-1.86824

0.273

2

0.080247

-1.40341

0.274

3

0.12963

-1.12814

0.274

4

0.179012

-0.91914

0.274

5

0.228395

-0.74414

0.275

6

Step 2 of 3

Chapter Chapter 7.3, Problem 11AYU is Solved
Step 3 of 3

Textbook: Fundamentals of Statistics
Edition: 4
Author: Michael Sullivan,III
ISBN: 9780321838704

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