condition mean min max ZT0-3 239.60000000000002 239.60000000000002 239.60000000000002 ZT4-7 261.7 261.7 261.7 ZT8-11 276.85 276.85 276.85 ZT12-15 355.79999999999995 355.79999999999995 355.79999999999995 ZT16-19 298.4 298.4 298.4 ZT20-23 323.45000000000005 323.45000000000005 323.45000000000005