Dr Nick

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    Kaplan University
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    University of Santo Tomas
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Category > Statistics Posted 10 Nov 2017 My Price 14.00

Interquartile range measures variability,

Interquartile range is ##46##

Interquartile range measures variability, based on difference between third quartile and first quartile. It is defined as ##Q_3-Q_1##.

To find first and third quartile, we should first arrange the data ##{9,30,2,48,42,18,81,5,55,73,11}## in increasing order which is as follows.

##{2,5,9,11,18,30,42,48,55,73,81}##

As there are ##11## data points, ##Q_1## is ##(11+1)/4## or ##3^(rd)## data point i.e. ##9##.

and ##(11+1)xx3/4=9^(th)## data point i.e. ##55##

Hence Interquartile range is ##55-9=46##

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Dr Nick
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Status NEW Posted 10 Nov 2017 11:11 AM My Price 14.00

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