condition mean min max ZT0-3 87.132959315 53.01445823 121.2514604 ZT4-7 52.678263835 47.53186139 57.82466628 ZT8-11 64.6258570675 61.367406360000004 67.884307775 ZT12-15 85.1383125 73.50779679 96.76882821 ZT16-19 114.16710732 105.24234444 123.0918702 ZT20-23 136.798647925 127.1415447 146.45575115