condition mean min max ZT0-3 34.8425478725 31.83508873 37.850007015 ZT4-7 41.36303245 39.31257545333333 43.41348944666667 ZT8-11 45.10857767500001 38.209193320000004 52.00796203 ZT12-15 84.704092855 84.38000171666667 85.02818399333333 ZT16-19 57.86728866333333 49.82787836666667 65.90669896 ZT20-23 49.063907959999995 40.716448 57.411367919999996