condition mean min max ZT0-3 65.74865 65.74865 65.74865 ZT4-7 36.928200000000004 36.928200000000004 36.928200000000004 ZT8-11 41.118449999999996 41.118449999999996 41.118449999999996 ZT12-15 43.3431 43.3431 43.3431 ZT16-19 49.97205 49.97205 49.97205 ZT20-23 62.60195 62.60195 62.60195