condition mean min max ZT0-3 0.042577633999999996 0.009596496 0.075558772 ZT4-7 0.0083757975 0.0 0.016751595 ZT8-11 0.03056458 0.015618216 0.045510944 ZT12-15 0.0038854890000000002 0.0 0.0077709780000000004 ZT16-19 0.06178378500000001 0.0564141815 0.06715338850000001 ZT20-23 0.043562250749999996 0.0361314155 0.05099308599999999