condition mean min max ZT0-3 446.9 446.9 446.9 ZT4-7 389.7 389.7 389.7 ZT8-11 391.4 391.4 391.4 ZT12-15 381.35 381.35 381.35 ZT16-19 348.35 348.35 348.35 ZT20-23 345.1 345.1 345.1