Time Series Example – Quality Control, Manufacture of Automobile Piston Rings
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- Figure 1: Time Series Plot of Sample Means for Piston Ring Inside Diameters
| Time Series Example – Quality Control, Manufacture of Automobile Piston Rings
The data in the table below represent measurements of the inside diameters (in mm.) of forged automobile piston rings1. Samples of size five were selected from the production line at 25 uniformly spaced points in time. Table 1: Inside Diameters (in mm.) of Forged Automobile Piston Rings
On the next page are two time-series plots, for the sample means and one for the sample standard deviations, generated using Excel. Do you see any patterns? 1 Montgomery, D. C. Introduction to Statistical Quality Control, 6th Edition. John Wiley & Sons, Inc. (2009). Figure 1: Time Series Plot of Sample Means for Piston Ring Inside Diameters 
Figure 2: Time Series Plot of Sample Standard Deviations for Piston Ring Inside Diameters  Directory: ~jgleaton ~jgleaton -> Ch 3 – Descriptive Analysis and Presentation of Bivariate Data Definition Download 91.18 Kb. Share with your friends:
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