Lower And Upper Quartile Formula. When evaluating the quartiles always remember to first arrange the data in increasing order. 19 20 21 23 23 24 25 27 31.
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What it basically means is that in a data set with n data points. Now let s calculate the median lower quartile. This is the second quartile q 2.
Find the interquartile range and the quartile deviation for the given data in the table below.
At q 2 split the ordered data set into two halves. 20 21 2 20 5 lower quartile. The lower quartile q 1 is the median of the lower half of the data. That is quartile deviation q 3 q 1.
