condition mean min max ZT0-3 1594.63714075 1112.0386330000001 2077.2356485 ZT4-7 3431.09539925 2828.8139905 4033.376808 ZT8-11 2548.381895875 1990.8826567499998 3105.8811349999996 ZT12-15 323.96164376250005 68.74902666 579.1742608650001 ZT16-19 123.19140548749999 94.67946128 151.70334969499999 ZT20-23 135.20105463250002 104.862012015 165.54009725