condition mean min max ZT0-3 961.45 961.45 961.45 ZT4-7 986.5 986.5 986.5 ZT8-11 836.55 836.55 836.55 ZT12-15 698.8499999999999 698.8499999999999 698.8499999999999 ZT16-19 629.9 629.9 629.9 ZT20-23 701.3 701.3 701.3