condition mean min max ZT0-3 1221.0 1221.0 1221.0 ZT4-7 948.9 948.9 948.9 ZT8-11 926.35 926.35 926.35 ZT12-15 1046.8 1046.8 1046.8 ZT16-19 1118.75 1118.75 1118.75 ZT20-23 1287.0 1287.0 1287.0