condition mean min max ZT0-3 3219.1 3219.1 3219.1 ZT4-7 3941.7 3941.7 3941.7 ZT8-11 3631.8500000000004 3631.8500000000004 3631.8500000000004 ZT12-15 3825.6000000000004 3825.6000000000004 3825.6000000000004 ZT16-19 2501.85 2501.85 2501.85 ZT20-23 2355.05 2355.05 2355.05