Packaging: A variety of packing solutions exist for products that must be kept within a specific temperature range. Cold chain distribution is particularly useful in the food and pharmaceutical industries. A packaging company strives to maintain a constant temperature for its packages. It is believed that the temperature for its packages follows and normal distribution with a mean of 5 degrees Celsius and a standard deviation of 0.3 degrees Celsius. Inspectors take weekly samples for 5 weeks of eight randomly selected boxes and report the temperature in degrees Celsius. The data is given below: Week 1 Week 2 Week 3 Week 4 Week 5 3.98 5.52 5.79 3.98 5.14 4.99 5.52 6.42 5.79 6.25 5.15 4.98 4.88 5.77 4.89 5.23 4.28 4.02 4.3 5.99 4.77 5.12 4.76 6.41 6.35 5.21 5.08 5.08 4.55 5.11 5.51 5.86 4.58 6.02 6.02 4.95 4.95 5.44 5.95 4.28 Are any points outside the control limits? Does it appear that the process is in control? Explain.
Packaging: A variety of packing solutions exist for products that must be kept within a specific temperature
| Week 1 | Week 2 | Week 3 | Week 4 | Week 5 |
| 3.98 | 5.52 | 5.79 | 3.98 | 5.14 |
| 4.99 | 5.52 | 6.42 | 5.79 | 6.25 |
| 5.15 | 4.98 | 4.88 | 5.77 | 4.89 |
| 5.23 | 4.28 | 4.02 | 4.3 | 5.99 |
| 4.77 | 5.12 | 4.76 | 6.41 | 6.35 |
| 5.21 | 5.08 | 5.08 | 4.55 | 5.11 |
| 5.51 | 5.86 | 4.58 | 6.02 | 6.02 |
| 4.95 | 4.95 | 5.44 | 5.95 | 4.28 |
Are any points outside the control limits? Does it appear that the process is in control? Explain.
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