condition mean min max ZT0-3 789.95 789.95 789.95 ZT4-7 964.4 964.4 964.4 ZT8-11 924.6500000000001 924.6500000000001 924.6500000000001 ZT12-15 988.35 988.35 988.35 ZT16-19 1129.75 1129.75 1129.75 ZT20-23 911.1500000000001 911.1500000000001 911.1500000000001