1. The problem asks: Where are class boundaries and class limits used? 2. Class limits and class boundaries are concepts used in statistics, especially in grouping data into classes or intervals. 3. Class limits define the smallest and largest values that can belong to a class. For example, if a class is 10-19, then 10 is the lower class limit and 19 is the upper class limit. 4. Class boundaries are the actual dividing points between classes, used to avoid gaps between intervals. They are found by averaging the upper limit of one class and the lower limit of the next class. 5. These concepts are used when constructing frequency distributions, histograms, and grouped data analysis to organize data clearly and avoid ambiguity. 6. In summary, class limits set the range of each class, and class boundaries ensure continuous intervals without gaps in grouped data.