To find the range of the weights, you need to subtract the smallest weight from the largest weight.
First, let's identify the smallest and largest weights from the given data:
- Smallest weight: 166 pounds
- Largest weight: 309 pounds
Now, we calculate the range:
\[ \text{Range} = \text{Largest weight} - \text{Smallest weight} = 309 - 166 = 143 \]
Therefore, the range of the weights is 143 pounds.