The central region has the smallest distribution of profits because it has the smallest interquartile range (IQR), which is the distance between the first and third quartiles of the box plot. The IQR measures the spread of the middle 50% of the data. The smaller the IQR, the less variation in the data. Reference: https://help.tableau.com/current/pro/desktop/en-us/buildexamples_boxplot.htm https://www.statisticshowto.com/probability-and-statistics/interquartile-range/