To calculate the range of a data set, you subtract the smallest value from the largest value.
First, identify the smallest and largest numbers in the data set:
- The smallest number is 11.
- The largest number is 30.
Then, the range is calculated as follows:
Range = Largest value - Smallest value = 30 - 11 = 19.
So, the correct response is:
Subtract 30−11.