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Consider the following s control chart. Sample standard deviation 60- 50- 40- 30 20- 10- 2 8 10 12 Sample number 14 16 18 20 UCL-52.50 S-23.17 LCL-0 Which of the following is true? HINT: We do not use runs tests for S charts or for R charts, because we do not assume they are symmetric about the center line. There is a run of several points on or above the center line, so the process is out of control. There is weak evidence the process is out of control because several samples are unusually close to the center line. We cannot draw conclusions about whether the process is in control until we have observed at least 40 samples from the process. There is no evidence that the process is out of control.

Consider the following s control chart. Sample standard deviation 60- 50- 40- 30 20- 10- 2 8 10 12 Sample number 14 16 18 20 UCL-52.50 S-23.17 LCL-0 Which of the following is true? HINT: We do not use runs tests for S charts or for R charts, because we do not assume they are symmetric about the center line. There is a run of several points on or above the center line, so the process is out of control. There is weak evidence the process is out of control because several samples are unusually close to the center line. We cannot draw conclusions about whether the process is in control until we have observed at least 40 samples from the process. There is no evidence that the process is out of control.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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Consider the following s control chart. Sample standard deviation 60- 50- 40 30- 20- 10- 4 8 10 12 Sample number 14 16 18 20 UCL=52.50 S=23.17 LCL=0 Which of the following is true? HINT: We do not use runs tests for S charts or for R charts, because we do not assume they are symmetric about the center line. There is a run of several points on or above the center line, so the process is out of control. There is weak evidence the process is out of control because several samples are unusually close to the center line. We cannot draw conclusions about whether the process is in control until we have observed at least 40 samples from the process. There is no evidence that the process is out of control.
Transcribed Image Text:Consider the following s control chart. Sample standard deviation 60- 50- 40 30- 20- 10- 4 8 10 12 Sample number 14 16 18 20 UCL=52.50 S=23.17 LCL=0 Which of the following is true? HINT: We do not use runs tests for S charts or for R charts, because we do not assume they are symmetric about the center line. There is a run of several points on or above the center line, so the process is out of control. There is weak evidence the process is out of control because several samples are unusually close to the center line. We cannot draw conclusions about whether the process is in control until we have observed at least 40 samples from the process. There is no evidence that the process is out of control.
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