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Find out first and third quartiles from ...

Find out first and third quartiles from the following items:
9,15,12,21,8,17,20

Text Solution

Verified by Experts

Arranged in assending order of magnitude

`Q_(1)=(N+1)/(4)` th item `=(7+1)/(4)` th item =2nd item =9
`Q_(3)=(3(N+1))/(4)`th item `=(3(7+1))/(4)`th item=`(24)/(4)` th item
=6th item =20
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