condition mean min max ZT0-3 223.7 223.7 223.7 ZT4-7 454.1 454.1 454.1 ZT8-11 425.7 425.7 425.7 ZT12-15 437.9 437.9 437.9 ZT16-19 389.85 389.85 389.85 ZT20-23 327.25 327.25 327.25