condition mean min max ZT0-3 0.721629 0.4300575 1.0132005 ZT4-7 1.544515 1.544515 1.544515 ZT8-11 1.41608 1.41608 1.41608 ZT12-15 0 0 0 ZT16-19 1.1381450000000002 1.1381450000000002 1.1381450000000002 ZT20-23 0.8580505 0.8580505 0.8580505