A logistics firm conducted a study to compare the efficiency and reliability of Autonomous Delivery Robots (ADRs) and Human Bicycle Couriers. They recorded the delivery transit times (in minutes) for a standardized 3 km urban delivery route.
Table 1: Means and standard deviations of delivery transit times (in minutes) for ADRs and human couriers
| Autonomous Delivery Robots (ADRs) | Human Bicycle Couriers | |
|---|---|---|
| Mean (minutes) | 18.40 | 14.10 |
| Standard Deviation (SD) (minutes) | 0.95 | 4.12 |
What do the mean and standard deviation values in Table 1 suggest about the delivery performances of ADRs and human couriers in this study?
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