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When a certain glaze is applied to a ceramic surface, the

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

Solution for problem 3E Chapter 4.1

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 3E

When a certain glaze is applied to a ceramic surface, the probability is 5% that there will be discoloration, 20% that there will be a crack, and 23% that there will be either discoloration or a crack, or both. Let X = 1 if there is discoloration, and let X = 0 otherwise. Let Y = 1 if there is a crack, and let Y = 0 otherwise.

Let Z = 1 if there is either discoloration or  a crack, or both, and let Z = 0 otherwise.

a. Let px denote the success probability for X. Find px.

b. Let py denote the success probability for Y. Find pY.

c. Let pz denote the success probability for Z. Find pz

d. Is it possible for both X and Y to equal 1?

e. Does pz=px+py?

f. Does Z = X + Y? Explain.

Step-by-Step Solution:

Answer:

Step 1 of 6:

(a)

In this question, we are asked to find the success probability for  and hence .

Certain glaze is applied to a ceramic surface.

Discoloration in surface =

Crack in surface  = 20%

There will be either discoloration or a crack, or both in surface = 23%

Let if there is a discoloration in surface, let   otherwise.

Let if there is a crack in surface, let   otherwise.

Let if there will be either discoloration or a crack, or both in surface, let   otherwise.

 

Hence the success probability for () is .


Step 2 of 6

Chapter 4.1, Problem 3E is Solved
Step 3 of 6

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

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