Class boundaries are used in statistics to define the range of data that falls into a particular class interval. They are important for creating histograms and frequency distributions. Here’s how you can find class boundaries:
- Determine the Class Limits: Class limits are the smallest and largest values that can fall into each class interval. For example, if you have a class interval of 10-20, the lower class limit is 10, and the upper class limit is 20.
- Calculate the Class Boundaries: Class boundaries are found by subtracting 0.5 from the lower class limit and adding 0.5 to the upper class limit. This adjustment ensures that there are no gaps between the intervals. For the class interval 10-20, the lower class boundary would be 9.5, and the upper class boundary would be 20.5.
- Check for Overlapping: Ensure that the class boundaries do not overlap with adjacent intervals. Each class boundary should be unique to its interval.
By following these steps, you can accurately determine the class boundaries for your data set, which is essential for proper data analysis and representation.