First off, I'd like to thank Alienfb for his assistance with data collection. These are the results of Sixty battles against him during normal time, and twenty one during xtra cash time. My clan bonus remained constant for all battles.
Ratio of max cash possible to min cash possible = 2.25:1
*I found this a little earlier on a test with four targets, and about 30 battles each
Ratio of max xp possible to min xp possible = 2:1
*I have long known this ratio from this ancient post-http://cb1.carnageblender.com/bboard/q-and-a-fetch-msg.tcl?msg_id=0000V1. Specifically from Jon's reply:"all I did was take the same N xp that's been given, and return 2/3 N + random(0..2/3 N)."
Note on each ratio involving average rewards - They are probably off due to rounding by both me and cb. Luck would not be a factor because I averaged the min and max rather than each individual fight.
Ratio of average cash rewards to average xp rewards = 6.62:1(per minion for a four minion team)
Ratio of average cash rewards to average xp rewards during xtra cash time = 26.5:1(per minion for a four minion team)
Ratio of average cash rewards during xtra cash time to normal average cash rewards = 1.6:1
Ratio of average xp rewards during xtra cash time to normal average xp rewards = .4:1
I do not yet have any data of fights during xtra xp time, but I can guess-
Ratio of average xp rewards during xtra xp time to normal average xp rewards = 1.6:1
Ratio of average cash rewards during xtra xp time to normal average cash rewards = .4:1
Ratio of average cash rewards to average xp rewards during xtra xp time = 1.655:1
Note on cash rewards - During all eighty one battles recorded, there were only six values of cash rewards: min, 1.25 x min, 1.5 x min, 1.75 x min, 2x min, and 2.25 x min.