Answer: The range for the distribution = 30
Explanation:
The range of the distribution is computed as :
Range = Highest data value - Lowest data value
Given, the IQs of all students at a certain prep school were obtained. The highest was 135, and the lowest was 105.
Thus, Range = 135-105 (difference between highest and lowest value)
Range = 30
Therefore, the range for the distribution = 30