condition mean min max ZT0-3 74.81553242999999 68.09094978 81.54011507999999 ZT4-7 66.601281625 65.38795761 67.81460564 ZT8-11 76.75704765500001 74.33981951333334 79.17427579666666 ZT12-15 87.47050455166666 82.23443517666666 92.70657392666666 ZT16-19 81.42540587833334 79.53840160333334 83.31241015333333 ZT20-23 70.19504301500001 70.03564381333334 70.35444221666667