condition mean min max ZT0-3 0.1044335 0.0 0.3133005 ZT4-7 1.5562985 1.5562985 1.5562985 ZT8-11 6.698245 6.698245 6.698245 ZT12-15 3.2525899999999996 1.29923 5.20595 ZT16-19 2.111885 2.111885 2.111885 ZT20-23 0.683802 0.683802 0.683802