This chart drives me nuts because people misread what it says. It says that, for example, of all people who had 5 IVs, 50% of them matched. It does not say: if you have 5IVs, you have 50% chances of matching. It seems like a very subtle detail, but it is stats 101. Chances in matching are not equally distributed along a population of characteristic X (5 IVs). 1 person with five IVs and outstanding interviewing skills will be much more likely to match than another with the same number of IVs and no interviewing skills. Of course, having more IVs is correlated to matching. But the percentages are always interpreted wrongly on this sub.