condition mean min max ZT0-3 7.40718879125 4.7019471625 10.11243042 ZT4-7 8.885654263000001 6.0106917925 11.760616733500001 ZT8-11 30.2969467575 18.1627017 42.431191815 ZT12-15 76.412554505 73.813774275 79.01133473499999 ZT16-19 56.604708984999995 54.036871489999996 59.172546479999994 ZT20-23 39.65063997 37.934383335 41.366896605