condition mean min max ZT0-3 148.30898 148.30898 148.30898 ZT4-7 251.028073 251.028073 251.028073 ZT8-11 204.2930225 204.2930225 204.2930225 ZT12-15 212.1624905 212.1624905 212.1624905 ZT16-19 120.3326785 120.3326785 120.3326785 ZT20-23 98.92136550000001 98.92136550000001 98.92136550000001