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Ungrouped Frequency Table

Is it true to...

Question

Is it true to say that class-mark of a class interval is $1 / 2 (l o w e r + U p p e r l i m i t) ?$

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Solution

$\Rightarrow$ Class mark is mid-point of class interval.
$∴$ Its is true that, $C l a s s m a r k = \frac{1}{2} (L o w e r l i m i t + U p p e r l i m i t)$

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