condition mean min max ZT0-3 0.3626335655 0.19040328399999998 0.534863847 ZT4-7 1.5603062984999998 1.0082757425 2.1123368544999996 ZT8-11 2.3837021744999998 2.3084022859999997 2.459002063 ZT12-15 4.0254991557499995 2.6777719795 5.373226332 ZT16-19 3.6072665312499996 3.3893159634999996 3.825217099 ZT20-23 5.61695306 5.1289933345000005 6.1049127855