How To Find Class Boundaries in Statistics?

Class boundaries are used in grouped data to eliminate any gaps between classes, especially when dealing with continuous data. They are calculated by finding the midpoint between the upper limit of one class and the lower limit of the next class.

For example, if one class interval is 10-19 and the next is 20-29, the upper-class boundary of the first class is 19+ (20−19)/2 = 19.5 and the lower-class boundary of the next class is also 19.5.

To calculate class boundaries:

1. Identify the upper limit of a class and the lower limit of the subsequent class.
2. Calculate the difference between these two limits.
3. Divide the difference by 2 and add it to the upper limit of the lower class (or subtract it from the lower limit of the upper class).

In conclusion, finding class boundaries involves a simple calculation to ensure continuous intervals for grouped data, facilitating accurate statistical analysis.