Answer:
11
Explanation:
To find the range of a data set, we need to determine the difference between the largest and the smallest values in the set.
In this case, the data set is: 18, 20, 22, 11, 19, 18, 18.
1. To find the largest value, we look for the highest number in the set, which is 22.
2. To find the smallest value, we look for the lowest number in the set, which is 11.
3. Next, we subtract the smallest value from the largest value: 22 - 11 = 11.
Therefore, the range of this data set is 11.