condition mean min max ZT0-3 35.385371 35.385371 35.385371 ZT4-7 77.1047685 77.1047685 77.1047685 ZT8-11 94.59081900000001 94.59081900000001 94.59081900000001 ZT12-15 84.7007375 84.7007375 84.7007375 ZT16-19 93.21655849999999 93.21655849999999 93.21655849999999 ZT20-23 36.5363 36.5363 36.5363