Question

calculate quartile deviation and coefficient of quartile deviation
series (more than) 70,60,50,40,30,20
frequency 7,18,40,40,63,68
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Answer 1

Answer:

Formally, the Quartile Deviation is equal to the half of the Inter-Quartile Range and thus we can write it as –

Qd=Q3–Q12

Therefore, we also call it the Semi Inter-Quartile Range.

Answer 2

QD EQUAL TO 12.845 and coefficient equal to 0.27