condition mean min max ZT0-3 5.7042397435 3.449622209 7.958857277999999 ZT4-7 13.743440018000001 9.720681206 17.76619883 ZT8-11 22.858126965 21.130130485000002 24.586123445 ZT12-15 29.6323789375 28.65795422 30.606803655 ZT16-19 31.260605415 27.403054814999997 35.118156015000004 ZT20-23 69.42792294 46.001826644999994 92.854019235