condition mean min max ZT0-3 204.8 204.8 204.8 ZT4-7 363.5 363.5 363.5 ZT8-11 311.95000000000005 311.95000000000005 311.95000000000005 ZT12-15 291.25 291.25 291.25 ZT16-19 246.85 246.85 246.85 ZT20-23 244.65 244.65 244.65