condition mean min max ZT0-3 534.55 534.55 534.55 ZT4-7 371.5 371.5 371.5 ZT8-11 374.85 374.85 374.85 ZT12-15 306.35 306.35 306.35 ZT16-19 385.8 385.8 385.8 ZT20-23 485.35 485.35 485.35