condition mean min max ZT0-3 201.55 201.55 201.55 ZT4-7 236.5 236.5 236.5 ZT8-11 281.9 281.9 281.9 ZT12-15 304.9 304.9 304.9 ZT16-19 288.95 288.95 288.95 ZT20-23 231.95 231.95 231.95