condition mean min max ZT0-3 0.475507416 0.321569991 0.629444841 ZT4-7 1.17634547625 1.0320634105000002 1.320627542 ZT8-11 1.71285603575 1.6293728729999999 1.7963391985000001 ZT12-15 0.88011100225 0.506988327 1.2532336775000001 ZT16-19 0.22792682000000003 0.1647050045 0.29114863550000003 ZT20-23 0.21121694674999997 0.1462290085 0.27620488499999996