Final answer:
The first cafe, with a mean delivery time of 23 minutes, has the shorter delivery time compared to the second cafe with a mean delivery time of 45 minutes.
Step-by-step explanation:
The first cafe has a mean delivery time of 23 minutes with a standard deviation of 5.5. The second cafe has a mean delivery time of 45 minutes with a standard deviation of 3.3.
To determine who has the shorter delivery time, we compare the means of the two cafes. The cafe with the mean delivery time of 23 minutes has the shorter delivery time compared to the cafe with the mean delivery time of 45 minutes.
The standard deviation provides information about the variability of the delivery times around the mean, but does not affect the determination of which cafe has the shorter average delivery time.