Answer:
To find the range in the number of pools sold during this period, you need to determine the difference between the highest and lowest values in the table.
Highest number of pools sold = 18 (in July)
Lowest number of pools sold = 10 (in March)
Now, calculate the range:
Range = Highest - Lowest
Range = 18 - 10
Range = 8
So, the range in the number of pools sold during this period is 8.