condition mean min max ZT0-3 1733.65 1733.65 1733.65 ZT4-7 1722.8 1722.8 1722.8 ZT8-11 2185.65 2185.65 2185.65 ZT12-15 2003.3 2003.3 2003.3 ZT16-19 1867.35 1867.35 1867.35 ZT20-23 1780.5 1780.5 1780.5