You're setting yourself up if you ask for this. I'm sure that if mathematical proof is wanting, they can always find a mathematician or two to whip it up.
If that mathematician is related in any way with East Anglia, prepare the popcorn for hours of free laughter and entertainment.
Mathematics refuses to succumb to data manipulation and selective deletions, or accidental loss of supporting data, or outrageously claiming (Waaaaaaah!) that you can't reveal your analytical methods, because you'll just criticise it!