from the output and the weight of each bag is measured, to be sure that the production is under control. Here are statistics of 16 such samples (values are in lb.). Sample Mean Range Sample Mean Range 1 5.10 0.40 5.01 0.49 4.89 0.57 10 5.11 0.56 3 4.92 0.59 11 5.17 0.64 5.35 0.44 12 5.15 0.63 5.09 0.74 13 5.00 0.35 6. 5.02 0.41 14 4.92 0.45 7 5.12 0.56 15 5.10 0.54 8 5.09 0.92 16 5.05 0.43 1. Given the above information, should we construct Phase 1 or Phase 2 control charts? Provide your justification.

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Lily Coffee produces coffee blend in 5 lb. bags. Every three hours a random sample of six bags is selected
from the output and the weight of each bag is measured, to be sure that the production is under control.
Here are statistics of 16 such samples (values are in lb.).
Sample Mean
Range Sample Mean Range
1
5.10
0.40
9
5.01
0.49
4.89
0.57
10
5.11
0.56
3
4.92
0.59
11
5.17
0.64
4
5.35
0.44
12
5.15
0.63
5
5.09
0.74
13
5.00
0.35
5.02
0.41
14
4.92
0.45
5.12
0.56
15
5.10
0.54
8
5.09
0.92
16
5.05
0.43
1. Given the above information, should we construct Phase 1 or Phase 2 control charts? Provide your
justification.
Transcribed Image Text:Lily Coffee produces coffee blend in 5 lb. bags. Every three hours a random sample of six bags is selected from the output and the weight of each bag is measured, to be sure that the production is under control. Here are statistics of 16 such samples (values are in lb.). Sample Mean Range Sample Mean Range 1 5.10 0.40 9 5.01 0.49 4.89 0.57 10 5.11 0.56 3 4.92 0.59 11 5.17 0.64 4 5.35 0.44 12 5.15 0.63 5 5.09 0.74 13 5.00 0.35 5.02 0.41 14 4.92 0.45 5.12 0.56 15 5.10 0.54 8 5.09 0.92 16 5.05 0.43 1. Given the above information, should we construct Phase 1 or Phase 2 control charts? Provide your justification.
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