What are quartiles? How are quartiles, deciles and percentiles di… - Vidyadip

Question

What are quartiles? How are quartiles, deciles and percentiles different from each other?

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Answer

Quartile is that value which divides the total distribution into four equal parts. So there are three quartiles, i.e. $Q_1, Q_2$ and $Q_3, Q_1, Q_2$ and $Q_3$ are termed as first quartile, second quartile and third quartile or lower quartile, middle quartile and upper quartile respectively.
Quartiles, deciles and percentiles all are positional measures with following difference. Quartiles divide the series into four equal parts, deciles divide the series into 10 equal parts, and percentiles divide the series into 100 equal parts. Method of their estimation is also similar.

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