Final answer:
The outlier in the given data set of the number of deliveries per day is 6.
Step-by-step explanation:
The outlier in the given data set is the number 6. An outlier is a data value that is significantly different from other values in the set. In this case, the numbers of deliveries made per day are mostly clustered around the range of 20-32, but the value 6 is much lower than the rest.