# How Do I Calculate the Upper or Lower Quartile?

## Answer

To calculate the upper or lower quartile you can use a median data set. The lower quartile is the median of the lower half of the data set while the upper quartile is the median of the upper half of the data set. To see a worked example, go to: http://www.mathsteacher.com.au/year9/ch17_statistics/06_quartiles/quartiles.htm
Q&A Related to "How Do I Calculate the Upper or Lower Quartile"
 1. Define the upper quartile more formally. The upper quartile may also be called the third quartile and is frequently designated as Q3. Since it separates the highest 25 percent http://www.ehow.com/how_5142080_calculate-upper-qu...
 1. Arrange your number set from smallest to largest. Note the minimum -- or smallest number in the set -- and maximum. 2. Determine the median or the central number in the set. If http://www.ehow.com/how_5135293_calculate-lower-qu...
 The upper quartile, for a set of ordinal observations, is a value such that a quarter of the observations have a greater value. Similarly, the lower quartile is a value such that http://wiki.answers.com/Q/What_is_the_upper_and_lo...
 We calculate lower and upper quartiles (in statistics) to see if there are any outliers in the data we collected. We add 1.5 * IQR (inter-quartile range) to the upper quartile and http://uk.answers.yahoo.com/question/index?qid=201...
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