condition mean min max ZT0-3 22.623702592500003 19.675826935 25.57157825 ZT4-7 5.0274111655 3.4468207335 6.6080015974999995 ZT8-11 1.5271546487499998 1.226869673 1.8274396244999997 ZT12-15 13.15839218875 7.673214875 18.6435695025 ZT16-19 35.223854715 31.26081095 39.186898479999996 ZT20-23 51.473974025000004 38.53871369 64.40923436