condition mean min max ZT0-3 766.5999999999999 766.5999999999999 766.5999999999999 ZT4-7 858.4 858.4 858.4 ZT8-11 871.3499999999999 871.3499999999999 871.3499999999999 ZT12-15 926.05 926.05 926.05 ZT16-19 885.95 885.95 885.95 ZT20-23 793.3499999999999 793.3499999999999 793.3499999999999