condition mean min max ZT0-3 1.1340037782499999 0.7496568859999999 1.5183506705 ZT4-7 2.516813965 2.4481002055 2.5855277245000003 ZT8-11 1.90235413125 1.375315138 2.4293931245000002 ZT12-15 8.95322365575 7.07810185 10.8283454615 ZT16-19 9.225712363749999 8.190152682499999 10.261272044999998 ZT20-23 7.481519747750001 5.875387723 9.087651772500001