classroom number limits
The lower class limit is 400. The upper class limit is 499. Class Boundaries. Class Boundaries are the midpoints between the upper class limit of a class and the lower class limit of the next class in the sequence. Therefore, each class has an upper and lower class boundary. Example: Using the frequency table above, determine the class boundaries of the first three classes. For the first class, 200 â 299. The lower class boundary is the midpoint between 199 and 200, that is 199.5. The upper class boundary is the midpoint between 299 and 300, that is 299.5.