Question: 5. A medical laboratory has collected data on the processing time (hours) between the receipt of a specimen at the lab and the completion of
5. A medical laboratory has collected data on the processing time (hours) between the receipt of a specimen at the lab and the completion of the work (based on a sample size of 20 specimens per day). The data collected is as follows:
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| Processing Time (hours) | |
| Day | X-Bar | Range |
| 1 | 1.72 | 3.57 |
| 2 | 2.03 | 3.98 |
| 3 | 2.18 | 3.54 |
| 4 | 1.90 | 5.49 |
| 5 | 2.53 | 3.99 |
| 6 | 3.26 | 2.34 |
| 7 | 2.11 | 3.36 |
| 8 | 2.35 | 4.52 |
| 9 | 1.46 | 4.39 |
| 10 | 2.31 | 3.24 |
| 11 | 2.13 | 2.62 |
| 12 | 2.48 | 3.37 |
| 13 | 2.50 | 6.97 |
| 14 | 2.37 | 4.06 |
| 15 | 2.78 | 4.27 |
| 16 | 2.12 | 3.21 |
| 17 | 2.10 | 3.48 |
| 18 | 2.49 | 3.62 |
| 19 | 2.32 | 2.19 |
| 20 | 2.43 | 4.67 |
| 21 | 2.52 | 3.10 |
| 22 | 2.61 | 4.00 |
| 23 | 2.07 | 3.06 |
| 24 | 2.33 | 2.40 |
| 25 | 2.36 | 3.52 |
| 26 | 2.47 | 4.82 |
| 27 | 2.28 | 2.89 |
| 28 | 1.60 | 5.60 |
| 29 | 2.54 | 2.98 |
| 30 | 2.63 | 3.84 |
Construct the necessary control charts using Excel. Show the upper control limits, the lower control limits, and the centerline. Show the calculations on one page and the control charts on the following pages. State whether the processes are in or out of control.
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