condition mean min max ZT0-3 198.45 198.45 198.45 ZT4-7 228.5 228.5 228.5 ZT8-11 301.45 301.45 301.45 ZT12-15 321.0 321.0 321.0 ZT16-19 289.95000000000005 289.95000000000005 289.95000000000005 ZT20-23 230.95 230.95 230.95