How do I find class boundaries in a frequency distribution

Add 0.5 to upper limit and subtract 0.5 from lower limitStep-by-step explanation:Step 1: Find the class interval column where limits are givene.g. Class Interval       10-20       20-30       30-40Step 2: Identify the upper limit and the lower limitUpper limits : 20, 30, 40Lower limits: 10, 20, 30Step 3: Add 0.5 in the upper limit to find the upper limit of the class boundary20+0.5=20.530+0.5=30.540+0.5=40.5Step 4: Subtract 0.5 in the lower limit to find the lower limit of the class boundary10-0.5=9.520-0.5=19.530-0.5=29.5Step 5: Make a column of class boundary and write the valuesClass intervals    Class boundaries     10-20                    9.5-20.5     20-30                   20.5-30.5     30-40                   30.5-40.5Keyword: DistributionLearn more about distribution at