condition mean min max ZT0-3 865.0999999999999 865.0999999999999 865.0999999999999 ZT4-7 689.7 689.7 689.7 ZT8-11 677.0999999999999 677.0999999999999 677.0999999999999 ZT12-15 901.3 901.3 901.3 ZT16-19 1036.35 1036.35 1036.35 ZT20-23 997.25 997.25 997.25