Table: list of craters on venus
Question: What is the standard deviation of the diameters of the craters on Venus in the given list?
Step 1 (Operation, Indexing): diameter (km)
Step 2 (Operation, Sorting): diameter (km)
Step 3 (Reasoning, Grounding): standard deviation, STD
Step 4 (Reasoning, Aggregating): STD, diameter (km)
Answer: 15.63