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A gear has been designed to have a diameter of 3 inches. The standard deviation of the process is 0.5 inch. A control chart is shown. Each chart has horizontal lines drawn at the mean, μ, μ±20, and at μ ± 30. Determine if the process shown is in control or out of control. Explain. Diameter (inches) 5- 3- Gears 11 3 4 5 6 7 8 9 10 11 Observation number Is the process in control or out of control? Select all that apply. A. Out of control, because two out of three consecutive points lie more than two standard deviations from the mean. B. Out of control, because there are nine consecutive points either above or below the mean. C. Out of control, because a point lies more than three standard deviations beyond the mean. D. In control, because none of the three warning signals detected a change.

A gear has been designed to have a diameter of 3 inches. The standard deviation of the process is 0.5 inch. A control chart is shown. Each chart has horizontal lines drawn at the mean, μ, μ±20, and at μ ± 30. Determine if the process shown is in control or out of control. Explain. Diameter (inches) 5- 3- Gears 11 3 4 5 6 7 8 9 10 11 Observation number Is the process in control or out of control? Select all that apply. A. Out of control, because two out of three consecutive points lie more than two standard deviations from the mean. B. Out of control, because there are nine consecutive points either above or below the mean. C. Out of control, because a point lies more than three standard deviations beyond the mean. D. In control, because none of the three warning signals detected a change.

MATLAB: An Introduction with Applications
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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A gear has been designed to have a diameter of 3 inches. The standard deviation of the process is 0.5 inch. A control chart is shown. Each chart has horizontal lines drawn at the mean, μ, μ ±20, and at μ ± 30. Determine if the process shown is in control or out of control. Explain. Diameter (inches) Gears 1 T 0 1 2 3 4 5 6 7 8 9 10 11 Observation number Is the process in control or out of control? Select all that apply. A. Out of control, because two out of three consecutive points lie more than two standard deviations from the mean. B. Out of control, because there are nine consecutive points either above or below the mean. C. Out of control, because a point lies more than three standard deviations beyond the mean. D. In control, because none of the three warning signals detected a change.
Transcribed Image Text:A gear has been designed to have a diameter of 3 inches. The standard deviation of the process is 0.5 inch. A control chart is shown. Each chart has horizontal lines drawn at the mean, μ, μ ±20, and at μ ± 30. Determine if the process shown is in control or out of control. Explain. Diameter (inches) Gears 1 T 0 1 2 3 4 5 6 7 8 9 10 11 Observation number Is the process in control or out of control? Select all that apply. A. Out of control, because two out of three consecutive points lie more than two standard deviations from the mean. B. Out of control, because there are nine consecutive points either above or below the mean. C. Out of control, because a point lies more than three standard deviations beyond the mean. D. In control, because none of the three warning signals detected a change.
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