condition mean min max ZT0-3 56.6825680325 49.97422012 63.390915945 ZT4-7 19.61845373275 14.919904945 24.3170025205 ZT8-11 28.769002490000002 18.535872185000002 39.002132795 ZT12-15 38.225091137499994 36.00658575999999 40.443596514999996 ZT16-19 35.983179557499994 35.774256914999995 36.1921022 ZT20-23 46.3768551875 43.24315362 49.510556754999996