condition mean min max ZT0-3 452.255084 452.255084 452.255084 ZT4-7 803.745017 803.745017 803.745017 ZT8-11 924.5135620000001 924.5135620000001 924.5135620000001 ZT12-15 719.177752 719.177752 719.177752 ZT16-19 644.197088 644.197088 644.197088 ZT20-23 735.8520735 735.8520735 735.8520735