condition mean min max ZT0-3 0.208546 0.1367095 0.2803825 ZT4-7 0.70372 0.70372 0.70372 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.8257270000000001 0.8257270000000001 0.8257270000000001 ZT20-23 1.65971 1.65971 1.65971