condition mean min max ZT0-3 4.1110331125 0.0 8.222066225 ZT4-7 95.53569399 56.939639985 134.13174799499998 ZT8-11 146.23400043499998 119.81327452000001 172.65472634999998 ZT12-15 12.91960606575 0.7153042645000001 25.123907867 ZT16-19 0.4026302575 0.3604069645 0.4448535505 ZT20-23 0.228858873 0.044459483499999994 0.4132582625