condition mean min max ZT0-3 2240.85 2240.85 2240.85 ZT4-7 1362.9 1362.9 1362.9 ZT8-11 1165.6 1165.6 1165.6 ZT12-15 989.6 989.6 989.6 ZT16-19 770.9000000000001 770.9000000000001 770.9000000000001 ZT20-23 990.6 990.6 990.6