condition mean min max ZT0-3 4801.799999999999 4801.799999999999 4801.799999999999 ZT4-7 4849.2 4849.2 4849.2 ZT8-11 4517.45 4517.45 4517.45 ZT12-15 3778.8999999999996 3778.8999999999996 3778.8999999999996 ZT16-19 3956.4 3956.4 3956.4 ZT20-23 4310.95 4310.95 4310.95