condition mean min max ZT0-3 854.8 854.8 854.8 ZT4-7 789.0 789.0 789.0 ZT8-11 687.3 687.3 687.3 ZT12-15 697.0999999999999 697.0999999999999 697.0999999999999 ZT16-19 753.0 753.0 753.0 ZT20-23 848.15 848.15 848.15