condition mean min max ZT0-3 669.95 669.95 669.95 ZT4-7 636.7 636.7 636.7 ZT8-11 618.0 618.0 618.0 ZT12-15 659.5 659.5 659.5 ZT16-19 684.8 684.8 684.8 ZT20-23 751.7 751.7 751.7