condition mean min max ZT0-3 3641.523333333333 3423.865 3932.8050000000003 ZT4-7 3966.32 3966.32 3966.32 ZT8-11 4867.78 4867.78 4867.78 ZT12-15 3049.4400000000005 2718.445 3380.4350000000004 ZT16-19 4424.645 4424.645 4424.645 ZT20-23 4138.92 4138.92 4138.92