Although it was the focus of the reporting at the time, I'm not a big fan of test match score analysis of the Battle of Britain. That said, attrition was a key factor of the battle and there are a lot of data points out there which constitute a target rich environment for statics.
- Data set - downloadable daily data in machine readable format
- Bootstrapping - bootstrap analysis
- Ratios - ratios of claims and losses
- Correlation - correlation between data points (TL;DR: nothing interesting)