The interquartile range, or IQR, can be found after the median has been determined by dividing the data sets that are above and below the median in half, which divides the entire set into quarters, and then combining the... More »

To calculate the interquartile range in Microsoft Excel, first enter the values for which you want to calculate the interquartile range in one single column. To calculate the first quartile, select a blank cell, and ente... More »

The interquartile range shows the size of the span between the middle half of the numbers in a set. The interquartile range is calculated by subtracting the number at the lower quartile from the number at the upper quart... More »

To find the IQR, find the median or center of the data, calculate the median of the lower and upper halves of the data, and find the difference between the medians of the lower and upper halves of data. You need a data s... More »

The interquartile range shows the size of the span between the middle half of the numbers in a set. The interquartile range is calculated by subtracting the number at the lower quartile from the number at the upper quart... More »

A mathematical outlier, which is a value vastly different from the majority of data, causes a skewed or misleading distribution in certain measures of central tendency within a data set, namely the mean and range, accord... More »

IQR stands for "interquartile range," a measurement of the location of the bulk of values in a set of data. The formula for finding the interquartile range is to subtract the first quartile from the third quartile. More »