The class? represent the minimum and maximum values for each class of a frequency distribution using grouped quantitative data

The answer is boundary.

Class boundary separates one class to another in a grouped frequency distribution. The lower class boundary is obtained by subtracting 0.5 units from the lower class limit and the upper class boundary is found by adding 0.5 units to the upper class limit.

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743