condition mean min max ZT0-3 1174.5 1174.5 1174.5 ZT4-7 763.1 763.1 763.1 ZT8-11 760.5999999999999 760.5999999999999 760.5999999999999 ZT12-15 711.05 711.05 711.05 ZT16-19 727.15 727.15 727.15 ZT20-23 852.3499999999999 852.3499999999999 852.3499999999999