condition mean min max ZT0-3 29.880499999999998 25.403 34.06845 ZT4-7 22.23125 22.23125 22.23125 ZT8-11 32.98115 32.98115 32.98115 ZT12-15 51.904300000000006 51.675200000000004 52.1334 ZT16-19 49.260549999999995 49.260549999999995 49.260549999999995 ZT20-23 47.9074 47.9074 47.9074