Question: Invection-molding process. Columns (3) through (6) below display the measures of diameters for 6 hourly samples of four parts each. Measurements (cm) (I) (2) (3)
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Invection-molding process. Columns (3) through (6) below display the measures of diameters for 6 hourly samples of four parts each.
Measurements (cm)
| (I) | (2) |
| (3) | (4) | (5) | (6) |
| Samnle Number | Date |
| X1 | X2 | X | X |
| 1 | 10/10 | " | 5.03 | 4.98 | 5.01 | 4.95 |
| 2 |
|
| 5.05 | 5.03 | 5.05 | 4.98 |
| 3 |
|
| 4.99 | 5.03 | 5.01 | 4.96 |
| 4 |
|
| 4.98 | 5.05 | 5.05 | 4.94 |
| 5 |
|
| 4.95 | 5.04 | 4.99 | 4.99 |
| 6 |
|
| 5.00 | 5.05 | 5.01 | 4.97 |
Calculate x and R for each sample. Then calculate 51 and R. Draw a mean chart and a range chart. Is the process in control?
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