A quality analyst wants to construct a control chart for determining whether three machines that produce the same part are under control with regard to a particular quality variable. Four parts were randomly taken from each machine with the following measurements:

FINANCIAL ACCOUNTING
10th Edition
ISBN:9781259964947
Author:Libby
Publisher:Libby
Chapter1: Financial Statements And Business Decisions
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A quality analyst wants to construct a control chart for determining whether
three machines that produce the same part are under control with regard to
a particular quality variable. Four parts were randomly taken from each
machine with the following measurements:
Machine
Measurements
# 1
23
22
21
20
# 2
24
25
22
23
#3
21
24
22
21
# 4
23
21
22
22
If the upper control limit is 25 and the lower control limit is 20, which
machine appears to be out of control?
# 1
# 2
# 4
# 3
Transcribed Image Text:A quality analyst wants to construct a control chart for determining whether three machines that produce the same part are under control with regard to a particular quality variable. Four parts were randomly taken from each machine with the following measurements: Machine Measurements # 1 23 22 21 20 # 2 24 25 22 23 #3 21 24 22 21 # 4 23 21 22 22 If the upper control limit is 25 and the lower control limit is 20, which machine appears to be out of control? # 1 # 2 # 4 # 3
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