condition mean min max ZT0-3 25.192050000000002 25.192050000000002 25.192050000000002 ZT4-7 21.518700000000003 21.518700000000003 21.518700000000003 ZT8-11 19.60595 19.60595 19.60595 ZT12-15 16.6668 16.6668 16.6668 ZT16-19 26.0981 26.0981 26.0981 ZT20-23 24.6077 24.6077 24.6077