To find the range of a set of data, you subtract the smallest value from the largest value.
In your list of thicknesses:
- The smallest value is 0.004 cm.
- The largest value is 0.214 cm.
Now, calculate the range:
\[ \text{Range} = \text{Largest value} - \text{Smallest value} = 0.214 , \text{cm} - 0.004 , \text{cm} = 0.210 , \text{cm} \]
Therefore, the range of this set of data is 0.210 cm.