condition mean min max ZT0-3 901.8 901.8 901.8 ZT4-7 855.3 855.3 855.3 ZT8-11 949.05 949.05 949.05 ZT12-15 878.45 878.45 878.45 ZT16-19 988.8499999999999 988.8499999999999 988.8499999999999 ZT20-23 872.2 872.2 872.2