At Becta's Computer Manufacturing, the production team sampled four pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours; The following are the results produced (measured in cm): Hour xBar R Hour xBar R 1 3.25 .71 13 3.11 .85 2 3.1 1.18 14 2.83 1.31 3.22 1.43 15 3.12 1.06 4 3.39 1.26 16 2.84 .5 5 3.07 1.17 17 2.86 1.43 6. 2.86 .32 18 2.74 1.29 7 3.05 .53 19 3.41 1.61 8 2.65 1.13 20 2.89 1.09 3.02 .71 21 2.65 1.08 10 2.85 1.33 22 3.28 .46 11 2.83 1.17 23 2.94 1.58 12 2.97 .4 24 2.64 97 3. 00

At Becta's Computer Manufacturing, the production team sampled four pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours; The following are the results produced (measured in cm): Hour xBar R Hour xBar R 1 3.25 .71 13 3.11 .85 2 3.1 1.18 14 2.83 1.31 3.22 1.43 15 3.12 1.06 4 3.39 1.26 16 2.84 .5 5 3.07 1.17 17 2.86 1.43 6. 2.86 .32 18 2.74 1.29 7 3.05 .53 19 3.41 1.61 8 2.65 1.13 20 2.89 1.09 3.02 .71 21 2.65 1.08 10 2.85 1.33 22 3.28 .46 11 2.83 1.17 23 2.94 1.58 12 2.97 .4 24 2.64 97 3. 00

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

(a) Label and compute the necessary data needed to calculate the upper and lower limits for the xBar and the R charts.

(b) Develop the xBar and the R charts.

(c) Plot the information and look for patterns. Determine and explain whether there is any cause for concern in the cutting process.

At Becta's Computer Manufacturing, the production team sampled four pieces of precision-cut wire (to be used
in computer assembly) every hour for the past 24 hours; The following are the results produced (measured in
cm):
Hour
хBar
Hour
хBar
R
1.
3.25
.71
13
3.11
.85
3.1
1.18
14
2.83
1.31
3.22
1.43
15
3.12
1.06
4
3.39
1.26
16
2.84
.5
3.07
1.17
17
2.86
1.43
2.86
.32
18
2.74
1.29
7
3.05
.53
19
3.41
1.61
2.65
1.13
20
2.89
1.09
3.02
.71
21
2.65
1.08
10
2.85
1.33
22
3.28
.46
11
2.83
1.17
23
2.94
1.58
12
2.97
.4
24
2.64
.97
2.
6.
00

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