condition mean min max ZT0-3 431.95 431.95 431.95 ZT4-7 578.3 578.3 578.3 ZT8-11 560.4 560.4 560.4 ZT12-15 585.25 585.25 585.25 ZT16-19 485.75 485.75 485.75 ZT20-23 430.05 430.05 430.05