Statistical Methods in Engineering and Quality Assurance.pdf

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Statistical Methods
in
Engineering
and
Quality Assurance
Statistical
Methods
in
Engineering and
Quality Assurance
PETER
W.
M.
JOHN
A
Wiley-Interscience
Publication
JOHN
WILEY
8r
SONS,
INC.
New
York
0
Chichester
0
Brisbanc
0
Toronto
0
Singapore
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preserving
what
has
been written, it is
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John Wiley
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to
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o f
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Copyright
0
1990
by John Wiley
&
Sons, Inc.
All
rights rcserved. Published simultaneously in Canada.
Reproduction
or
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o f
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o f
this work
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the Permissions Departmcnt, John Wilcy
XC
Sons, lnc.
Library
o
Congress
Calaloging-in-Publicativn
Data
f
John, Peter William Mcrcdith.
Statistical methods in engineering
and
quality assurance
I
Peter
W.
M.
John.
cm.
- -
(Wiley scries in probability and mathcmatical
p:
statistics. Applied probability and statistics section)
locludes
bibliographical references
(p.
).
ISBN
0-471-82986-2
1.
Engineering- -Statistical methods.
2.
Quality control-
-Statistical methods.
3.
Quality assurance.
I.
Title.
11.
Serics.
1')
9M
TA340.JV
620'.0072-4
~ 2 0
00-3371
X
CIP
10
Y
8
7
6
5
4
3
Contents
xv
1
Preface
1.
Quality Assurance and Statistics
1.1
1.2
1.3
1.4
1
.s
1.6
1.7
1.8
1.9
1.10
1.11
Quality and American Business,
1
Competition, 2
The Reaction, 2
Total Quality,
3
Kaizen
,
4
Why Statistics?.
4
The Future,
5
Gathering Information,
6
This Book,
7
Instructional Considerations,
7
Keprisc,
8
2. Descriptive Statistics
9
2.
I
2.2
2.3
2.4
2.5
Introduction,
9
The Mean and Standard Deviation,
9
The
Median and Quartiles,
11
Ishikawa's Seven Tools, 13
Histograms, 14
2.6
An Example
of
a Nonsymmetrical Distribution,
16
2.7
I)otplots,
I 9
2.8
Stem-and-Leaf Diagrams, 20
2.9 Splitting Stems, 21
2.10 Box-and-Whisker Plots, 22
2.11 Pareto Diagrams, 24
V

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