Final answer:
The range of the data set is 15 hours.
Step-by-step explanation:
To find the range of a data set, you subtract the smallest value from the largest value.
Looking at the provided list of hours worked each week by college graduates: 39, 38, 52, 43, 45, 40, 37, 52, the smallest number of hours is 37 and the largest is 52.
Therefore, the range is 52 - 37 = 15 hours.