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.
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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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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