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  4. Find the quartile deviation of the following discrete series.

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Q. Find the quartile deviation of the following discrete series.Mathematics Question Image

Statistics

Solution:

(i) $QD =\frac{Q_3-Q_1}{2}$.
(ii) Find the cumulative frequency.
(iii) Identify the $x$ value corresponding to $(\frac{N}{2})$ th observation and $(\frac{3 N}{2})$ th observation.