condition mean min max ZT0-3 11283.0 11283.0 11283.0 ZT4-7 5644.9 5644.9 5644.9 ZT8-11 6835.5 6835.5 6835.5 ZT12-15 9853.55 9853.55 9853.55 ZT16-19 14814.2 14814.2 14814.2 ZT20-23 14042.15 14042.15 14042.15