Based on the box plot below, the answer to his question is 23 minutes. To calculate the IQR, you must subtract the value of the first quartile from the value of the third quartile (IQR = Q3 – Q1).

The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first ...

4.1 - 2.5 = 1.6\) The range of masses is 1.6 kg. The interquartile range shows the range in values of the central 50% of the data. To find the interquartile range, subtract the value of the lower ...