condition mean min max ZT0-3 792.4 792.4 792.4 ZT4-7 873.2 873.2 873.2 ZT8-11 601.0 601.0 601.0 ZT12-15 720.6500000000001 720.6500000000001 720.6500000000001 ZT16-19 1076.95 1076.95 1076.95 ZT20-23 1213.7 1213.7 1213.7