condition mean min max ZT0-3 1494.95 1494.95 1494.95 ZT4-7 670.8 670.8 670.8 ZT8-11 617.0 617.0 617.0 ZT12-15 540.45 540.45 540.45 ZT16-19 835.4 835.4 835.4 ZT20-23 980.3 980.3 980.3