"Razz Berry effectiveness statistics"

#PokemonGO: We still don't know exactly how Razz Berries work.Well, we have a 1.5 multiplier (http://ift.tt/2bzH067), but we don't know how it is used.So I decided to collect some statistics.Method: when I was level 20, I tried to catch all common Pokémon between 150CP and 250CP with normal Pokéballs, alternatively with and without Razz Berry.Here are my results. Raw data is available if someone's interested.Sample size: 91 throws / 46 Pokéballs with Razz Berry, 45 Pokéballs without Razz Berry.Pokémon types: 1 Zubat, 9 Weedle, 1 Spearow, 23 Rattata, 1 Pidgeotto, 18 Pidgey, 1 Kakuna, 1 Caterpie.No Razz Berry: 18 catches, 27 escapes of which 7 flees.Razz Berry: 22 catches, 24 escapes of which 6 flees.Unberried Pokéball catch rate: 40%Berried Pokéball catch rate: 48%Unberried Pokéball flee rate: 26%Berried Pokéball flee rate: 25%Conclusion: Razz Berries slightly improve the catch rate. Razz Berries have no influence on the flee rate.My best - but still imperfect - guess is that the catch rate gets modified like that: RPCR = 1.5*PCR - PCR2/2 (which yields 52% and not 48% when PCR = 40%) => any other idea about how that 1.5 can be used?EDIT: I know that the sample size is small. I will collect more data and if you also collect more data we can achieve a larger sample size. If trainer level doesn't matter (according to http://ift.tt/2b16ONw it doesn't), I ask all 18+ level players to collect data on Rattata, Pidgey and Weedle approximately between levels 13 and 18 (i.e. 215-300 CP for Pidgey, 185-255 CP for Rattata and 140-195 CP for Weedle).EDIT: Minor Text Fixes™ (I edited the formula because I meant "squared and divided by two" and not "to the power of 2/2 i.e. 1") via /r/TheSilphRoad http://ift.tt/2bBusiU