condition mean min max ZT0-3 636.9742680825 37.57320994 1236.375326225 ZT4-7 3546.960717 2835.2732484999997 4258.6481855 ZT8-11 3017.3015005 2428.6607895 3605.9422115 ZT12-15 327.491851593 21.264952456 633.71875073 ZT16-19 5.4105045865 2.9296170349999997 7.8913921380000005 ZT20-23 4.89312934525 1.7579094175 8.028349273