The data for this analysis was taken from https://github.com/KaushikR/CbseScraper, many thanks to him for providing that.

Processing this data took a lot of time, not least because I did a good chunk of the work in Excel.

The results are available in the 2015 section of Releases.

It includes the files in Excel (.xlsb) format and in IBM SPSS format (raw and statistical results). A PDF version of the statistical results is also available, and it's highly recommended that you take a look at that.