condition mean min max ZT0-3 0.3530061666666666 0.1296705 0.5214165 ZT4-7 0.123814 0.123814 0.123814 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.1214015 0.1214015 0.1214015 ZT20-23 0.4262125 0.4262125 0.4262125