Answers

2016-02-12T16:47:41+05:30
Quartile Deviation( Qd)=(Q3-Q2)/2
n=no of observations=7
Q3=3*(n+1)/4 th observation=3*(7+1)/4=6th observation=575
Q1=(n+1)/4 th observation=(7+1)/4=2th observation=840
Qd=(575-840)/2=-265/2=-132.5
Hence, quartile deviation= -132.5

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