Sorry, user logicallee explained this better than I did. You're looking at 4-5 graphs put next to each other for comparison. The nearest flatland with the huge towers is the one troubled clinic.
As you can see, data of the clinic we were investigating is the first 6 long rows, and ones behind it are clinics we were not investigating. We asked to compare a number of clinics so not to tip our hand, and the administration took half a year of paranoid data checking before giving it to us.
I know, not the most intuitive graph, but the graph was meant to be a diagnostic for only me, the person who composed the data. As you can see, a single glance at the graph revealed the problem, without involving any numerical analysis.
Here's an annotated version of that, drawn by a child apparently: http://i.imgur.com/1dcuuXI.png
As you can see, data of the clinic we were investigating is the first 6 long rows, and ones behind it are clinics we were not investigating. We asked to compare a number of clinics so not to tip our hand, and the administration took half a year of paranoid data checking before giving it to us.
I know, not the most intuitive graph, but the graph was meant to be a diagnostic for only me, the person who composed the data. As you can see, a single glance at the graph revealed the problem, without involving any numerical analysis.