condition mean min max ZT0-3 541.35 541.35 541.35 ZT4-7 437.1 437.1 437.1 ZT8-11 474.35 474.35 474.35 ZT12-15 567.1 567.1 567.1 ZT16-19 543.7 543.7 543.7 ZT20-23 611.9 611.9 611.9