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Prob. 8-5

Note: on this and succeeding worksheets in this file are
data sets for all problems that require substantial
amounts of data in Chapter 8
Problem 8-5
Costcutin Co.
Product
A B C
Total sales $1,537,280 $933,600 $1,397,120
Total quality costs
as % of sales 21% 18% 12%
External failure 30% 19% 10%
Internal failure 55% 31% 28%
Appraisal 11% 39% 36%
Prevention 4% 11% 26%
(Bold figures represent percentages of quality costs by product.)

Prob. 8-6

Problem 8-6
Impressive Printing Company
Cost Element Amount
Customer complaint remakes $24,300
Printing plate revisions 25,200
Quality improvement projects 11,700
Gauging 90,000
Other waste 34,200
Correction of typographical errors 189,000
Proofreading 405,000
Quality planning 50,400
Press downtime 256,400
Bindery waste 45,900
Checking and inspection 37,800
Totals $1,169,900

Prob. 8-7

Problem 8-7
Miami Valley Aircraft Service Co.
Quarterly Costs (in thousands of dollars)
1 2 3 4
External failure 1,000 900 950 725
Internal failure 3,500 3,250 2,900 2,200
Appraisal 900 1,200 1,550 800
Prevention 400 500 650 800
Total Quality Cost $5,800 $5,850 $6,050 $4,525
Total Labor Cost $21,000 $19,500 $24,500 $20,500

Prob. 8-8

Problem 8-8
Reship Solutions, Inc.
Cost Element Amount
Checking outbound boxes for errors $607,750
Quality planning 10,625
Downtime due to conveyor/computer problems 342,125
Packaging waste 68,000
Incoming product inspection 51,000
Customer complaint rework 34,000
Correcting erroneous orders before shipping 36,550
Quality training of associates 25,925
Quality improvement projects 17,425
Other waste 36,125
Correction of typographical errors--pick tickets 11,475
Total Quality Cost $1,241,000

Prob. 8-9

Problem 8-9
Nosoco Paper Mill
Category Annual Loss
Downtime $30,000
Testing costs 15,000
Rejected paper 375,000
Odd lot 66,000
Inspection 25,000
Customer complaints 103,000
Wasted materials 31,000
Quality improvement training 10,000
Total Quality Cost $655,000

Prob. 8-10

Problem 8-10
Stateside Metrology Repairs
Category Annual Loss
Customer returns $120,000
Inspection costs -- outgoing 40,000
Inspection costs -- incoming 20,000
Workstation downtime 60,000
Training/system improvement 35,000
Rework costs 55,000
Total Quality Costs $330,000

Prob. 8-11

Problem 8-11
Beechware Software Corp.
Category Annual Loss
Rework $153,000
Rejected disks (loaded) 22,950
Rejected disks (blank) 13,770
Inspection costs (extra)--incoming 104,040
Inspection costs (extra)--outgoing 49,725
Customer returns 275,400
Training and system improvement costs 21,420
System downtime 67,320
Total Quality Costs $707,625

Prob. 8-12

Problem 8-12
GenLab, Ltd.
Genetic Research Thermometer
Thermometer A Thermometer B
0.00071 -0.00040 0.00246 0.00130 0.00018 0.00126 -0.00221 -0.00011 -0.00071 -0.00032
0.00025 0.00245 0.00141 0.00142 0.00015 0.00180 -0.00135 0.00210 0.00027 -0.00076
0.00098 -0.00251 0.00178 0.00221 -0.00129 0.00020 -0.00024 0.00071 -0.00120 -0.00001
-0.00065 -0.00027 -0.00136 -0.00039 -0.00063 0.00079 -0.00165 0.00232 -0.00012 -0.00041
0.00124 0.00036 -0.00186 0.00118 -0.00089 0.00080 -0.00040 -0.00155 0.00114 -0.00149

Prob. 8-13

Problem 8-13
Aussieburgers, Ltd.
Scale A Scale B
113 112 115 115 113 118 116 116 115 116
114 115 114 116 114 114 115 115 116 116
115 116 112 114 115 115 116 117 116 115
114 112 113 113 114 117 117 116 117 118
113 114 115 114 114 114 114 116 116 117

Prob. 8-14

Problem 8-14
NEW Gauge R&R
OPERATOR 1 OPERATOR 2 OPERATOR 3
Part/Trial 1 2 Part/Trial 1 2 Part/Trial 1 2
1 1.511 1.518 1 1.522 1.491 1 1.473 1.502
2 1.501 1.480 2 1.510 1.495 2 1.488 1.500
3 1.499 1.480 3 1.473 1.543 3 1.513 1.453
4 1.510 1.491 4 1.525 1.489 4 1.479 1.505
5 1.496 1.487 5 1.531 1.459 5 1.449 1.521
6 1.475 1.493 6 1.495 1.492 6 1.494 1.475
7 1.508 1.486 7 1.475 1.474 7 1.484 1.455
8 1.486 1.519 8 1.526 1.508 8 1.494 1.516

Prob. 8-15

Problem 8-15
Frankford Brake Systems
OPERATOR 1 OPERATOR 2
Part/Trial 1 2 3 Part/Trial 1 2 3
1 0.97 0.99 0.99 1 0.96 0.99 1.00
2 0.94 0.96 0.97 2 0.95 1.00 1.00
3 1.00 1.00 0.99 3 1.02 1.03 1.00
4 0.97 1.00 0.99 4 0.96 0.98 0.98
5 0.99 1.00 1.00 5 1.01 1.01 1.03
6 1.02 1.04 1.03 6 0.99 1.02 1.02
7 0.96 1.01 0.98 7 0.97 0.97 0.99
8 1.00 1.02 0.97 8 1.07 1.02 1.00
9 1.03 1.01 1.00 9 1.04 1.02 0.98
10 0.96 0.98 0.95 10 0.99 0.95 0.95

Prob. 8-16

Problem 8-16
Accurate Parts, Inc.
OPERATOR 1 OPERATOR 2 OPERATOR 3
Part/Trial 1 2 3 1 2 3 1 2 3
1 1.558 1.607 1.686 1.519 1.548 1.764 1.568 1.617 1.588
2 1.627 1.627 1.646 1.646 1.715 1.656 1.646 1.676 1.725
3 1.646 1.646 1.588 1.568 1.392 1.333 1.343 1.274 1.323
4 1.323 1.392 1.450 1.392 1.490 1.558 1.470 1.450 1.480
5 1.646 1.509 1.597 1.715 1.656 1.548 1.558 1.607 1.627
6 1.715 1.705 1.588 1.509 1.490 1.372 1.607 1.676 1.646
7 1.431 1.803 1.490 1.548 1.352 1.539 1.460 1.480 1.411
8 1.627 1.509 1.548 1.558 1.529 1.646 1.441 1.460 1.499
9 1.568 1.548 1.705 1.450 1.548 1.470 1.607 1.637 1.656
10 1.548 1.607 1.568 1.392 1.392 1.509 1.519 1.558 1.499

Prob. 8-18

Problem 8-18
Mach4 Tool Co - Machining Process - Part A
Sample Number
1 2 3 4 5
0.556 0.562 0.564 0.564 0.572
0.572 0.572 0.572 0.573 0.575
0.575 0.574 0.575 0.575 0.577
0.577 0.577 0.577 0.577 0.580
0.579 0.581 0.583 0.586 0.575
Problem 8-18
Mach4 Tool Co - Machining Process - Part B
Sample Number
1 2 3 4 5
0.573 0.578 0.576 0.579 0.574
0.575 0.575 0.573 0.577 0.576
0.573 0.574 0.576 0.575 0.579
0.576 0.577 0.577 0.574 0.575
0.576 0.574 0.575 0.575 0.576

Prob. 8-19

Problem 8-19
Saramit Theatrical Products
22.027 21.992 22.007 21.985 21.995
22.003 22.007 21.996 22.001 22.009
22.018 22.014 22.009 21.996 21.989
21.992 21.991 22.002 22.012 22.003
22.007 22.012 22.005 21.999 22.008
21.996 22.009 21.999 21.985 22.005
21.992 21.995 22.000 22.000 22.008
22.000 21.997 21.992 21.995 22.017
22.005 21.989 22.006 21.973 22.003
22.010 21.996 21.993 22.007 21.998
21.990 21.995 21.995 22.010 21.984
22.021 22.004 21.997 22.014 22.001
22.018 21.995 21.995 21.998 22.003
22.004 22.001 21.995 21.997 22.006
22.004 22.006 22.001 22.008 21.996
22.002 21.987 22.000 21.995 22.000
21.998 22.001 22.001 21.999 22.012
21.994 21.995 22.006 22.005 22.008
22.015 22.012 21.995 21.986 22.017
22.009 21.991 22.000 22.002 22.006

Prob. 8-20

Problem 8-20
River City Parts Co.
Part 1 Part 2 Part 3
1.74831 2.01144 1.25426
1.75740 2.00448 1.24775
1.75134 2.01492 1.24558
1.73316 2.00448 1.24992
1.75134 2.00448 1.23907
1.71498 2.00100 1.25860
1.75437 2.00796 1.25643
1.73619 2.00100 1.25209
1.73922 1.98708 1.25426
1.73619 1.99752 1.24341
1.74528 1.99752 1.25643
1.74831 2.00100 1.24775
1.76346 1.99404 1.24341
1.74528 2.00796 1.24558
1.76952 2.00448 1.23907
1.70892 2.00448 1.24124
1.75134 2.00100 1.24558
1.71195 1.99752 1.24992
1.74831 2.00100 1.25209
1.77861 2.00100 1.24992
1.75740 1.98708 1.24992
1.73619 1.99404 1.24558
1.74225 1.98708 1.24992
1.74528 1.98360 1.24775
1.73922 2.00100 1.24775

Prob. 8-22

Problem 8-22
River Bottom Fire Department
Continued with follow-up data in Problem 8-25
Sample
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
3.81 4.08 4.19 3.88 4.15 4.95 4.01 4.85 4.24 4.99 4.07 4.71 3.91 4.60 4.57
3.93 3.82 4.30 4.16 4.93 4.12 4.89 4.05 4.87 4.16 4.88 3.98 4.64 3.94 4.06
3.89 3.98 4.17 4.12 4.86 4.08 4.87 4.08 5.33 4.16 4.89 4.04 4.68 4.00 3.95
3.91 4.21 4.23 4.24 4.98 4.23 4.98 3.98 4.83 4.18 4.86 3.94 4.57 3.85 3.96
4.08 4.00 4.12 4.17 4.58 4.12 4.89 4.07 4.93 4.29 4.93 3.94 4.57 3.86 3.98
4.01 4.06 4.15 4.17 4.97 4.13 4.88 3.95 4.83 4.37 4.97 3.90 4.52 3.88 3.95
Sample
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
4.19 4.08 4.00 4.16 5.03 4.16 4.92 4.09 4.95 4.11 4.80 3.95 4.59 3.90  4.58
4.19 4.08 4.04 4.14 4.89 4.14 4.90 4.12 4.93 4.16 4.90 3.90 4.57 3.87 4.58
4.03 4.21 4.06 4.19 4.88 4.19 4.91 4.10 4.82 3.93 4.63 3.93 4.59 3.88 4.64
4.06 4.22 4.10 4.17 4.92 4.06 4.84 4.14 4.89 4.03 4.68 4.01 4.72 4.00  4.66
3.88 4.18 4.01 4.02 4.85 4.18 4.98 4.14 4.85 4.01 4.63 4.10 4.80 4.01 4.66
4.00 4.10 4.13 4.31 5.13 4.31 5.09 4.27 5.03 4.14 4.76 4.01 4.65 4.02 4.75

Prob. 8-23

Problem 8-23
Palma State Bank
DATA
Sample
1 2 3 4 5
1 11.86 12.09 12.05 12.25 12.18
2 11.57 13.21 12.24 11.95 12.02
3 12.31 11.96 12.22 12.43 12.36
4 11.98 13.72 12.12 12.88 12.95
5 12.71 12.40 11.96 12.41 12.34
6 13.46 13.13 12.17 11.59 12.24
7 11.83 12.78 12.56 12.40 12.49
8 12.44 12.80 12.19 12.73 12.26
9 12.01 11.92 12.59 11.99 12.52
10 11.56 14.01 12.80 11.42 12.87
11 12.95 13.00 13.06 12.19 12.93
12 12.88 12.52 12.69 12.13 12.59
13 12.72 13.65 12.49 12.41 13.58
14 13.16 12.91 13.01 11.73 12.98
15 12.51 12.87 12.45 13.50 12.80
16 12.94 12.34 12.91 13.41 13.01
17 13.28 13.14 12.27 12.03 13.21
18 12.89 12.53 12.74 12.25 12.96
19 12.70 12.79 12.49 12.62 12.63
20 11.76 11.28 12.56 12.30 11.83
21 12.23 12.78 12.42 12.75 12.16
22 11.88 11.96 11.67 13.40 12.03
23 13.03 12.14 12.65 12.43 12.58
24 13.06 13.43 13.05 12.64 13.12
25 12.27 12.34 12.25 12.81 12.27

Prob. 8-24

Problem 8-24 & 8-29
Birdseye Magnetronics Data
DATA
Sample
1 2 3
1 0.35 0.35 0.32
2 0.34 0.36 0.32
3 0.30 0.35 0.37
4 0.32 0.33 0.36
5 0.39 0.33 0.32
6 0.33 0.36 0.30
7 0.31 0.34 0.32
8 0.31 0.30 0.32
9 0.40 0.33 0.38
10 0.33 0.28 0.35
11 0.38 0.34 0.35
12 0.32 0.35 0.34
13 0.35 0.34 0.36
14 0.30 0.32 0.35
15 0.33 0.33 0.32
16 0.32 0.33 0.37
17 0.35 0.32 0.35
18 0.32 0.37 0.34
19 0.37 0.36 0.38
20 0.32 0.35 0.33
21 0.36 0.33 0.33
22 0.32 0.34 0.32
23 0.32 0.38 0.37
24 0.34 0.38 0.35
25 0.38 0.35 0.35
26 0.37 0.36 0.39
27 0.36 0.32 0.34
28 0.32 0.32 0.34
29 0.33 0.32 0.30
30 0.30 0.36 0.32

Prob. 8-25

Problem 8-25
River Bottom Fire Station
Continuation of 8-22
New data after process adjustment
Sample
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
4.48 4.80 4.68 4.71 4.56 4.74 4.75 4.76 4.46 4.54 4.32 4.23 4.62 4.61 4.54
4.75 4.79 4.69 4.56 4.47 4.29 4.43 4.49 4.39 4.58 4.52 4.29 4.46 4.40 4.54
4.58 4.60 4.44 4.40 4.28 4.29 4.91 4.67 4.41 4.43 4.62 4.52 4.62 4.70 4.63
4.67 4.80 4.44 4.64 4.63 4.86 4.57 4.52 4.69 4.66 4.40 4.66 4.66 4.50 4.41
4.76 4.42 4.69 4.23 4.34 4.59 4.47 4.65 4.45 4.51 4.30 4.37 4.51 4.35 4.52
4.26 4.71 4.78 4.59 4.41 4.49 4.68 4.43 4.56 4.60 4.90 4.55 4.68 4.55 4.62
Sample
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
4.60 4.62 4.23 4.35 4.51 4.73 4.58 4.43 4.39 4.71 4.33 4.68 4.46 4.15 4.51
4.56 4.24 4.34 4.37 4.46 4.50 4.68 4.29 4.56 4.67 4.41 4.68 4.56 4.78 4.51
4.56 4.78 4.72 4.42 4.37 4.45 4.60 4.81 4.64 4.67 4.48 4.58 4.30 4.61 4.38
4.64 4.42 4.56 4.53 4.46 4.72 4.65 4.38 4.84 4.78 4.44 4.49 4.64 4.66 4.72
4.72 4.55 4.74 4.32 4.49 4.16 4.77 4.74 4.29 4.82 4.54 4.64 4.48 4.39 4.55
4.75 4.53 4.62 4.38 4.74 4.43 4.51 4.36 4.53 4.46 4.42 4.56 4.68 4.52 4.47

Prob. 8-26

Problem 8-26
J. McWilliams Swim Club
Sample DATA
1 1.22 1.32 1.21 1.35
2 1.36 1.32 1.31 1.37
3 1.22 1.25 1.33 1.28
4 1.26 1.25 1.22 1.21
5 1.29 1.23 1.34 1.15
6 1.31 1.25 1.24 1.26
7 1.24 1.26 1.24 1.18
8 1.28 1.26 1.19 1.29
9 1.28 1.22 1.27 1.20
10 1.14 1.19 1.18 1.15
11 1.20 1.21 1.20 1.21
12 1.25 1.17 1.20 1.24
13 1.26 1.25 1.30 1.22
14 1.24 1.19 1.22 1.21
15 1.36 1.18 1.36 1.16
16 1.25 1.15 1.29 1.15
17 1.30 1.32 1.29 1.23
18 1.29 1.34 1.20 1.37
19 1.20 1.24 1.14 1.23
20 1.26 1.28 1.25 1.29
21 1.17 1.30 1.15 1.30
22 1.28 1.25 1.21 1.26
23 1.19 1.16 1.25 1.27
24 1.23 1.24 1.23 1.22
25 1.22 1.23 1.26 1.23
26 1.24 1.25 1.16 1.20
27 1.32 1.19 1.25 1.19
28 1.25 1.21 1.21 1.22
29 1.17 1.17 1.29 1.29
30 1.14 1.14 1.35 1.24

Prob. 8-28

Problem 8-28
Hermitage DNA Labs, LLC
Sample DATA
1 0.23 -0.04 0.44 -0.79 -0.07
2 -0.14 -0.83 0.81 0.21 -1.31
3 0.16 -1.29 0.77 -0.28 -0.11
4 0.28 0.44 0.44 0.50 -0.31
5 -0.44 -1.03 -0.11 -0.47 0.06
6 -0.58 -0.66 0.24 -0.54 0.17
7 0.36 -0.58 0.09 0.11 1.29
8 0.84 0.23 0.82 0.21 0.31
9 0.28 0.03 -0.19 0.81 0.17
10 0.74 0.49 0.53 -0.34 0.69
11 0.74 0.85 -0.72 -0.17 -0.36
12 0.84 0.06 -0.06 -0.74 -0.55
13 0.32 0.95 0.11 -0.32 0.24
14 -0.52 -0.22 0.39 0.70 0.00
15 -0.02 -0.45 -0.89 -0.84 0.35
16 -0.35 -0.74 -0.02 1.06 -1.21
17 1.04 0.61 0.03 0.34 -0.65
18 -0.14 -0.07 0.75 -0.14 -0.95
19 -0.27 0.27 0.14 0.57 -0.57
20 -0.09 -0.26 -0.90 -0.18 -0.08
21 0.49 -0.22 0.38 -0.35 -0.63
22 -0.42 0.04 0.79 -0.29 -0.10
23 0.76 -0.15 0.27 -0.34 -0.37
24 -0.38 0.01 -0.15 0.25 1.14
25 -0.25 0.82 -0.12 -0.63 -1.18
26 0.30 0.62 -0.30 0.40 0.58
27 -0.15 -0.33 0.33 0.13 1.05
28 -0.74 -0.19 0.23 1.01 0.33
29 -0.67 1.22 0.32 -0.64 0.03
30 0.01 -0.82 0.22 0.42 -0.19
31 -0.98 0.66 0.19 0.07 -0.25
32 0.58 -0.51 0.33 0.03 -0.44
33 1.12 -0.36 -0.65 0.65 -0.60
34 0.49 -0.84 -0.40 -0.36 -0.82
35 0.06 0.27 0.03 0.47 0.81
36 -0.74 -0.56 -0.13 0.06 -0.54
37 0.99 -0.48 0.96 0.82 -0.08
38 -0.56 0.38 0.13 -0.68 0.22
39 -0.53 0.49 -0.56 -1.29 1.02
40 0.81 0.33 0.41 -0.77 0.52
41 0.18 -0.49 0.81 0.16 0.17
42 0.17 -1.03 -0.31 0.28 0.21
43 0.17 0.07 0.33 -0.40 -0.54
44 0.53 0.26 0.12 0.48 0.05
45 0.1 -0.97 0.23 0.09 0.43
46 -0.73 -0.40 -1.00 -0.03 0.37
47 0.48 -1.00 0.88 0.40 0.09
48 0.3 0.19 0.83 0.26 -1.04
49 -0.18 -0.34 0.67 -0.08 -0.92
50 0.31 -0.42 -0.18 -0.46 0.78

Prob. 8-30

Problem 8-30
Rapid Check Kiters
a) Initial data b) After the process was determined to be under control, process monitoring began, using the control limits established above.
The results of the initial 20 samples of size 4 are shown below. The results of 20 more samples are shown below.
Sample DATA Sample DATA
1 1.01 1.03 1.07 1.10 21 1.11 1.06 1.17 1.09
2 1.15 1.05 1.08 1.01 22 1.17 1.08 1.09 1.00
3 1.08 1.14 1.06 1.10 23 1.11 1.13 1.12 1.03
4 0.98 1.08 0.97 1.04 24 1.12 1.07 1.03 1.09
5 1.13 1.05 1.14 1.01 25 1.09 1.12 1.10 1.05
6 1.06 1.10 1.16 1.02 26 1.09 1.06 1.00 1.10
7 1.03 1.04 1.13 1.05 27 1.09 1.09 1.04 1.08
8 1.08 1.11 1.14 1.07 28 1.08 1.12 1.08 1.02
9 1.13 1.11 1.06 1.05 29 1.19 1.03 1.02 0.95
10 1.16 1.06 1.07 1.02 30 1.05 1.05 1.06 1.08
11 1.08 1.00 0.99 1.03 31 1.05 1.04 1.07 1.00
12 1.11 1.07 1.05 1.05 32 1.10 1.00 1.05 1.02
13 1.09 1.13 1.09 1.14 33 1.08 1.12 1.08 1.09
14 1.05 0.95 1.15 1.08 34 1.03 1.05 0.98 1.11
15 1.07 1.04 1.10 1.06 35 1.09 1.03 1.01 1.10
16 1.05 1.07 1.06 1.04 36 1.12 1.01 1.03 1.05
17 1.03 1.08 1.04 1.08 37 1.07 1.13 1.04 1.04
18 1.01 1.08 1.05 1.04 38 1.04 1.18 1.18 1.04
19 1.08 1.07 1.11 1.06 39 1.01 1.05 1.14 1.17
20 1.09 1.08 1.02 1.15 40 1.05 1.02 1.08 1.06

Prob. 8-32

Problem 8-32
PCDrives
Sample x-bar R
1 77.4 18.3
2 60.2 20.1
3 63.5 22.6
4 64.0 27.5
5 58.4 15.3
6 74.4 17.9
7 70.8 26.8
8 74.6 30.6
9 77.3 19.2
10 65.7 14.6
11 63.4 24.5
12 76.6 21.7
13 71.7 25.5
14 70.9 29.7
15 59.6 14.5
68.5666666667 21.92

Prob. 8-33

Problem 8-33
Constant Hope Hospital
Sample
1 16.7 14.7 12.8 15.8
2 13.3 16.8 17.4 14.9
3 14.0 15.1 13.0 14.5
4 15.2 15.0 14.9 15.1
5 15.0 14.2 13.4 15.7
6 15.9 14.1 15.0 16.3
7 14.8 15.6 16.0 15.0
8 14.7 15.4 16.3 15.0
9 15.4 14.9 15.2 16.9
10 16.7 14.3 14.7 14.8
11 14.0 15.5 15.4 16.2
12 14.4 14.1 13.9 15.7
13 15.8 15.3 14.3 15.5
14 15.5 15.0 15.1 14.4
15 12.7 17.3 12.4 15.7
16 16.0 16.1 14.8 15.0
17 14.0 13.4 14.8 14.0
18 15.1 16.2 13.3 15.6
19 13.9 14.8 13.9 14.1
20 15.9 14.8 13.8 16.3
21 14.2 15.6 15.1 14.6
22 14.8 16.0 16.0 13.2
23 16.3 16.1 14.0 14.6
24 17.4 13.6 14.9 16.0
25 13.8 16.1 15.5 13.2

Prob. 8-34

Problem 8-34
Fujiyama Electronics
Sample
Number
1 4.92 4.26 4.94 4.29
2 4.65 5.54 5.00 5.42
3 5.77 5.26 4.76 4.79
4 6.25 4.88 5.66 4.44
5 5.27 5.41 6.02 4.91
6 5.22 5.38 5.08 4.65
7 5.47 4.68 4.56 4.70
8 5.71 4.54 4.17 4.87
9 5.24 5.58 4.72 5.41
10 4.42 5.18 4.79 4.73
11 5.14 4.26 4.71 5.48
12 4.92 5.78 5.50 5.05
13 5.79 3.83 4.30 4.78
14 4.92 4.80 4.75 5.59
15 5.68 5.74 4.65 5.20
16 5.43 4.81 5.27 4.96
17 4.79 6.04 4.47 5.18
18 5.03 4.66 5.25 4.46
19 4.30 5.47 4.27 4.34
20 6.07 4.97 5.51 5.02
21 5.11 4.90 5.91 4.66
22 4.50 5.24 4.86 4.35
23 4.91 4.79 5.74 5.03
24 4.65 4.71 4.81 5.32
25 4.70 5.50 6.04 4.30
26 5.87 5.30 5.78 5.07
27 4.41 4.75 4.95 5.11
28 4.92 5.47 4.72 5.02
29 5.68 4.97 4.79 4.66
30 5.43 4.90 4.71 4.35

Prob. 8-35

Problem 8-35
El Grande Toro Restaurante
1 1.20 1.51 1.50 1.82 1.46
2 1.45 1.16 1.38 1.26 1.58
3 2.08 1.72 1.26 1.74 1.71
4 1.31 1.20 1.26 1.66 1.39
5 1.09 1.19 1.31 1.91 1.20
6 0.72 1.93 1.48 1.64 1.73
7 1.18 1.43 1.03 1.12 1.76
8 1.69 1.55 1.75 1.91 0.81
9 1.21 1.36 1.54 1.46 1.55
10 0.69 0.92 1.12 1.51 1.77
11 1.47 1.79 1.57 1.13 1.75
12 1.69 1.58 1.60 1.80 1.91
13 1.61 1.11 1.57 1.83 1.33
14 0.72 1.36 1.36 1.81 1.82
15 1.69 1.39 1.56 0.69 1.52
16 1.87 2.04 1.61 1.73 1.57
17 1.60 1.54 0.93 1.98 1.66
18 1.50 1.44 2.01 1.17 1.49
19 1.16 1.74 1.34 1.50 1.27
20 1.71 2.10 1.22 0.90 1.31
21 1.44 1.85 1.50 2.23 1.80
22 1.65 1.32 1.23 1.55 1.60
23 0.97 1.54 1.42 1.47 1.94
24 1.88 0.99 0.91 1.65 1.92
25 2.11 1.54 1.72 1.69 1.60
26 1.11 0.97 1.24 1.32 1.34
27 1.83 1.71 0.87 1.58 1.73
28 0.97 1.33 0.87 1.51 1.97
29 1.72 1.92 1.54 1.64 2.26
30 1.56 2.11 1.65 1.39 1.47
31 0.91 1.62 1.26 1.00 1.45
32 1.37 1.94 1.51 0.95 1.59
33 1.66 1.59 1.44 1.77 0.95
34 1.94 1.23 1.29 1.15 1.36
35 1.70 1.39 2.02 1.24 1.31
36 1.42 1.54 1.67 1.29 1.23
37 1.94 1.58 1.42 1.43 2.15
38 1.43 1.43 1.67 1.53 1.89
39 1.76 1.31 1.43 1.87 1.08
40 1.02 1.26 1.27 1.73 1.11

Prob. 8-36

Problem 8-36 and 8-37
Moby Molding Co.
Sample Observations
Head 1 Head 2 Head 3 Head 4
1 0.06 0.03 0.05 0.03
2 -0.07 -0.01 0.05 0.02
3 -0.01 0.05 0.04 0.03
4 -0.08 0.02 0.03 0.07
5 -0.10 -0.02 0.02 0.07
6 -0.03 -0.01 0.03 0.07
7 -0.04 0.00 0.05 0.02
8 -0.03 0.04 0.05 0.05
9 -0.03 -0.04 -0.02 0.03
10 -0.03 -0.08 0.04 0.07
11 -0.05 -0.05 0.05 0.06
12 -0.06 -0.02 -0.01 0.04
13 -0.05 -0.06 0.01 0.00
14 -0.03 0.01 0.03 0.04
15 -0.04 0.01 0.02 0.02
16 -0.04 -0.04 0.04 0.10
17 -0.03 -0.04 0.01 0.11
18 -0.04 0.01 0.03 -0.02
19 -0.05 0.06 0.05 0.05
20 -0.03 -0.03 -0.03 0.07
21 0.04 0.03 0.06 -0.07
22 0.03 0.07 0.03 -0.01
23 0.02 0.06 0.07 -0.08
24 0.03 0.04 0.07 -0.10
25 0.05 0.00 0.07 -0.03
26 0.05 0.04 0.02 -0.04
27 -0.02 0.02 -0.01 -0.03
28 0.04 0.10 0.00 -0.03
29 0.05 0.11 0.04 -0.03
30 0.01 -0.06 -0.02 -0.03

Prob. 8-38

Problem 8-38
Gotham City Police Department
Sample Observations
1 0.780 0.760 0.770
2 0.770 0.750 0.770
3 0.760 0.790 0.740
4 0.750 0.760 0.760
5 0.750 0.750 0.770
6 0.780 0.800 0.740
7 0.740 0.750 0.770
8 0.780 0.730 0.710
9 0.750 0.750 0.770
10 0.760 0.730 0.760
11 0.770 0.740 0.760
12 0.780 0.750 0.730
13 0.770 0.770 0.790
14 0.730 0.770 0.730
15 0.790 0.750 0.760
16 0.770 0.750 0.760
17 0.710 0.750 0.750
18 0.770 0.790 0.750
19 0.760 0.780 0.780
20 0.720 0.710 0.750
21 0.790 0.780 0.780
22 0.790 0.760 0.750
23 0.720 0.780 0.750
24 0.790 0.730 0.790
25 0.760 0.760 0.780

Prob. 8-39

Problem 8-39
Charlie's China Emporium
Reading no. Values Reading no. Values Reading no. Values
1 41.13 26 33.76 51 41.13
2 32.63 27 34.30 52 33.76
3 46.03 28 31.60 53 47.14
4 30.40 29 52.72 54 31.38
5 38.78 30 36.25 55 22.72
6 33.76 31 49.03 56 52.72
7 46.98 32 18.22 57 39.68
8 53.90 33 52.83 58 38.22
9 22.72 34 35.70 59 49.37
10 24.30 35 20.45 60 30.88
11 51.03 36 28.70 61 40.45
12 38.22 37 37.75 62 34.88
13 36.25 38 39.41 63 46.03
14 45.95 39 25.78 64 19.41
15 40.45 40 55.18 65 38.22
16 52.83 41 30.38 66 34.88
17 32.63 42 42.10 67 20.38
18 41.13 43 19.30 68 54.95
19 18.70 44 17.04 69 21.50
20 35.70 45 25.40 70 17.04
21 30.40 46 16.23 71 52.72
22 15.78 47 34.88 72 57.18
23 46.03 48 53.80 73 40.45
24 46.98 49 46.03 74 18.70
25 42.88 50 41.57 75 35.70

Prob. 8-41

Problem 8-41
Altodiez Package Co.
Sample Number of Errors
1 3
2 3
3 3
4 4
5 7
6 8
7 3
8 3
9 6
10 8
11 7
12 7
13 3
14 2
15 3
16 7
17 8
18 2
19 7
20 5
21 3
22 5
23 6
24 7
25 8

Prob. 8-42

Problem 8-42 and 8-44
Full Life Insurance Co.
Day Number Defective
1 3
2 3
3 3
4 2
5 0
6 3
7 0
8 1
9 7
10 3
11 2
12 0
13 0
14 4
15 1
16 2
17 4
18 0
19 1
20 1
21 0
22 2
23 8
24 1
25 4

Prob. 8-43

Problem 8-43
SpeedyNetService.com
Peak Number of Number of
Period Calls Attempted Busy Signals
1 492 8
2 424 9
3 508 4
4 614 5
5 566 11
6 616 6
7 528 5
8 382 8
9 608 8
10 506 5
11 596 3
12 510 9
13 428 11
14 524 8
15 410 3
16 586 9
17 488 8
18 618 3
19 552 9
20 466 10
21 472 6
22 484 2
23 468 8
24 574 8
25 606 7
26 620 7
27 575 5
28 600 8
29 541 5
30 393 4

Prob. 8-45

Problem 8-45
Delgado Manufacturing Company
(Sample size = 50/sample)
Sample Number Defective
1 3
2 4
3 6
4 4
5 7
6 11
7 12
8 9
9 4
10 5
11 9
12 10
13 3
14 4
15 3
16 5
17 5
18 6
19 7
20 15
21 13
22 6
23 4
24 11
25 17
26 4
27 3
28 5
29 5
30 6

Prob. 8-46

Problem 8-46
Federal Scanline
Number of
Sample Nonconformances
1 12
2 11
3 1
4 10
5 5
6 4
7 1
8 9
9 4
10 6
11 5
12 7
13 10
14 9
15 13
16 1
17 14
18 11
19 11
20 12
21 9
22 8
23 6
24 14
25 5
26 11
27 10
28 7
29 3
30 11
240

Prob. 8-47

Problem 8-47
PharmaSuitica
Number of Defects
Sample per order (200 product order)
1 1
2 3
3 1
4 2
5 2
6 5
7 1
8 4
9 1
10 2
11 1
12 1
13 3
14 1
15 2
16 4
17 2
18 3
19 1
20 4
21 0
22 2
23 1
24 3
25 1
26 2
27 2
28 0
29 4
30 2
61

Prob. 8-48

Problem 8-48
Audubon Books, Inc
Month Errors Order sizes
Dec-14 5 204
Jan-15 5 188
Feb-15 6 158
Mar-15 9 180
Apr-15 0 182
May-15 5 155
Jun-15 3 162
Jul-15 5 149
Aug-15 5 154
Sep-15 4 164
Oct-15 4 192
Nov-15 10 173
Dec-15 3 174
Jan-16 3 189
Feb-16 5 124
Mar-16 4 195
Apr-16 3 162
May-16 7 157
Jun-16 6 189
Jul-16 8 177
Aug-16 6 158
Sep-16 5 156
Oct-16 4 201
Nov-16 7 174
Dec-16 6 168

Prob. 8-49

Problem 8-49
Top Billers
Sample Number Errors Bills
1 2 171
2 1 194
3 1 121
4 3 200
5 1 159
6 3 162
7 4 186
8 1 182
9 2 155
10 2 185
11 1 179
12 3 160
13 1 159
14 1 154
15 7 151
16 5 169
17 3 189
18 4 178
19 2 161
20 1 198