condition mean min max ZT0-3 912.75 912.75 912.75 ZT4-7 1125.3 1125.3 1125.3 ZT8-11 786.8 786.8 786.8 ZT12-15 930.9 930.9 930.9 ZT16-19 890.8 890.8 890.8 ZT20-23 855.2 855.2 855.2