condition mean min max ZT0-3 833.25 833.25 833.25 ZT4-7 998.5 998.5 998.5 ZT8-11 1009.7 1009.7 1009.7 ZT12-15 897.75 897.75 897.75 ZT16-19 919.8499999999999 919.8499999999999 919.8499999999999 ZT20-23 804.75 804.75 804.75