Question
Write formulae for obtaining class boundary points from Inclusive class limits.
✓
Answer
The formulae to find the class boundary points for the class limits of inclusive continuous frequency distribution are as follows :
Lower boundary point of a class $=\frac{(Lower \ limit \ of \ the \ class) + (Upper \ limit \ of \ the \ class \ preceding \ to \ that \ class)}{2}$
Upper boundary point of a class $=\frac{(Upper \ limit \ of \ the \ class) + (Lower \ limit \ of \ the \ class \ following \ that \ class)}{2}$
Lower boundary point of a class $=\frac{(Lower \ limit \ of \ the \ class) + (Upper \ limit \ of \ the \ class \ preceding \ to \ that \ class)}{2}$
Upper boundary point of a class $=\frac{(Upper \ limit \ of \ the \ class) + (Lower \ limit \ of \ the \ class \ following \ that \ class)}{2}$
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