condition mean min max ZT0-3 58.66318062249999 38.28484794 79.041513305 ZT4-7 248.171065675 185.29377499999998 311.04835635 ZT8-11 216.55096435500002 174.24960936 258.85231935 ZT12-15 26.225031844 10.156491708999999 42.293571979 ZT16-19 9.5729374545 9.1006706255 10.0452042835 ZT20-23 8.81561098725 7.7911207595 9.840101215