condition mean min max ZT0-3 329.718344075 291.56591375 367.8707744 ZT4-7 169.29498865 155.60547865 182.98449865 ZT8-11 211.279388875 182.57762885 239.9811489 ZT12-15 276.82185319999996 265.7407588 287.90294759999995 ZT16-19 339.319600425 327.01708759999997 351.62211325 ZT20-23 447.312640525 410.53444275000004 484.0908383