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The time needed for checking in at a hotel is to beinvestigated. Historically, the process has had a standarddeviation equal to .146. The means of 39 samples of n = 16are |
| Sample | Mean | Sample | Mean | Sample | Mean | Sample | Mean |
| 1 | 3.86 | 11 | 3.88 | 21 | 3.84 | 31 | 3.88 |
| 2 | 3.90 | 12 | 3.86 | 22 | 3.82 | 32 | 3.76 |
| 3 | 3.83 | 13 | 3.88 | 23 | 3.89 | 33 | 3.83 |
| 4 | 3.81 | 14 | 3.81 | 24 | 3.86 | 34 | 3.77 |
| 5 | 3.84 | 15 | 3.83 | 25 | 3.88 | 35 | 3.86 |
| 6 | 3.83 | 16 | 3.86 | 26 | 3.90 | 36 | 3.80 |
| 7 | 3.87 | 17 | 3.82 | 27 | 3.81 | 37 | 3.84 |
| 8 | 3.88 | 18 | 3.86 | 28 | 3.86 | 38 | 3.79 |
| 9 | 3.84 | 19 | 3.84 | 29 | 3.98 | 39 | 3.85 |
| 10 | 3.80 | 20 | 3.87 | 30 | 3.96 | ||
| a-1. |
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