condition mean min max ZT0-3 48.855149999999995 48.855149999999995 48.855149999999995 ZT4-7 38.85225 38.85225 38.85225 ZT8-11 38.1874 38.1874 38.1874 ZT12-15 39.24065 39.24065 39.24065 ZT16-19 38.3083 38.3083 38.3083 ZT20-23 50.7455 50.7455 50.7455