condition mean min max ZT0-3 121.480240325 77.44322844999999 165.5172522 ZT4-7 49.7900845725 46.520196 53.059973145 ZT8-11 67.5074838875 51.76362014 83.251347635 ZT12-15 48.015570985 33.86394109 62.167200879999996 ZT16-19 44.4767448625 43.493463335 45.46002639 ZT20-23 74.36200525000001 61.45402253500001 87.269987965