condition mean min max ZT0-3 1840.4 1840.4 1840.4 ZT4-7 1080.9 1080.9 1080.9 ZT8-11 878.8 878.8 878.8 ZT12-15 662.3 662.3 662.3 ZT16-19 840.75 840.75 840.75 ZT20-23 1254.55 1254.55 1254.55