condition mean min max ZT0-3 3904.3500000000004 3904.3500000000004 3904.3500000000004 ZT4-7 4048.4 4048.4 4048.4 ZT8-11 3744.1000000000004 3744.1000000000004 3744.1000000000004 ZT12-15 3682.25 3682.25 3682.25 ZT16-19 3285.3 3285.3 3285.3 ZT20-23 3092.65 3092.65 3092.65