A percentile or quartile measure is used for measuring dispersion. Each quartile is a median calculated as follows. The median, third quartile, and first quartile remain the same. Per capita carbon dioxide emissions are in the highest quartile of global emissions. Interquartile Range (IQR) &colon; is the distance between the upper and lower quartile. For discrete distributions, there is no universal agreement on selecting the quartile values. Polls of historians and political scientists rank Eisenhower in the top quartile of presidents. The rest of the funds dropped to the third or fourth quartile. OS 3.05 featured new financial functions and an 'on data' option for quartile calculation. This is in the low human development quartile. The precise rankings in this quartile are not published. If also required, the zeroth quartile is 3 and the fourth quartile is 20.