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A machine is used to fill cans with motor oil additive. A single sample can is selected every hour, and the weight of the can
- A machine is used to fill cans with motor oil additive. A single sample can is selected every hour, and the weight of the can is obtained. Since the filling process is automated, it has very stable variability, and long experience indicates that s = 0.02 oz. The individual observations for 24 hours of operation are shown in the below Table. Assume that the process target is 8.02 oz. USE MINITAB FOR CALCULATIONS.
Sample | Can Weight | Sample | Can Weight |
1 | 8.00 | 13 | 8.05 |
2 | 8.01 | 14 | 8.04 |
3 | 8.02 | 15 | 8.03 |
4 | 8.01 | 16 | 8.05 |
5 | 8.00 | 17 | 8.06 |
6 | 8.01 | 18 | 8.04 |
7 | 8.06 | 19 | 8.05 |
8 | 8.07 | 20 | 8.06 |
9 | 8.01 | 21 | 8.04 |
10 | 8.04 | 22 | 8.02 |
11 | 8.02 | 23 | 8.03 |
12 | 8.01 | 24 | 8.05 |
- Set up a moving average control chart with w = 5. Interpret the results.
- Set up an EWMA control chart with l = 0.2 and L = 3 for this process. Interpret the results.
- Set up an EWMA control chart with l = 0.1 and L = 2.7 for this process. Interpret the results.
- Set up a tabular CUSUM for this process. Design the CUSUM using the standardized values h = 4.77 and k = 0.5.
- Compare the charts constructed in part a, b, c, and
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