condition mean min max ZT0-3 1201.5 1201.5 1201.5 ZT4-7 941.6 941.6 941.6 ZT8-11 909.95 909.95 909.95 ZT12-15 1067.1999999999998 1067.1999999999998 1067.1999999999998 ZT16-19 1156.45 1156.45 1156.45 ZT20-23 1370.7 1370.7 1370.7