condition mean min max ZT0-3 1.4135900000000001 1.151955 1.675225 ZT4-7 1.83236 1.83236 1.83236 ZT8-11 4.170565 4.170565 4.170565 ZT12-15 0 0 0 ZT16-19 3.242775 3.242775 3.242775 ZT20-23 2.705925 2.705925 2.705925