Inter-decile ratios highlight the inequalities of a distribution: the D9/D1 ratio highlights the gap between the top (9th decile) and the bottom of the distribution (1st decile); the D9/D5 compares the top of the distribution to the median value; the D5/D1 compares the median to the bottom of the distribution.
<div xmlns="http://www.w3.org/1999/xhtml"><p>Inter-decile ratios highlight the inequalities of a distribution:</p><ul><li>the D9/D1 ratio highlights the gap between the top (9th decile) and the bottom of the distribution (1st decile);</li><li>the D9/D5 compares the top of the distribution to the median value;</li><li>the D5/D1 compares the median to the bottom of the distribution.</li></ul></div>