Boundaries calculator
📐 Class Boundaries Calculator
Calculate precise lower & upper class boundaries for frequency distributions.
(Default 0.5 for whole numbers. Use 0.05 for 1 decimal place, etc.)
📊 Calculation Results
Lower Class Boundary
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Upper Class Boundary
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📝 Step-by-Step Explanation
📏 Number Line Visualization
Quick Examples:
| # | Class Interval (e.g., 60-69) | Frequency (opt.) |
|---|
| # | Class Interval | Frequency | Lower Boundary | Upper Boundary |
|---|
📝 Step-by-Step Calculations
📏 Number Line Visualization
📊 Frequency Histogram (bars touch = class boundaries)
ℹ️ What are Class Boundaries?
Class boundaries are values midway between the upper limit of one class and the lower limit of the next — created by subtracting/adding the boundary adjustment from each class limit.
📐 Formula
Lower Boundary = Lower Limit − Adjustment
Upper Boundary = Upper Limit + Adjustment
Default adjustment = 0.5 (for whole-number data)
Upper Boundary = Upper Limit + Adjustment
Default adjustment = 0.5 (for whole-number data)
