condition mean min max ZT0-3 2641.3500000000004 2641.3500000000004 2641.3500000000004 ZT4-7 3657.2 3657.2 3657.2 ZT8-11 3130.95 3130.95 3130.95 ZT12-15 3276.7 3276.7 3276.7 ZT16-19 2513.15 2513.15 2513.15 ZT20-23 2213.05 2213.05 2213.05