condition mean min max ZT0-3 3640.7000000000003 3640.7000000000003 3640.7000000000003 ZT4-7 3093.8 3093.8 3093.8 ZT8-11 2451.3999999999996 2451.3999999999996 2451.3999999999996 ZT12-15 2652.85 2652.85 2652.85 ZT16-19 4190.6 4190.6 4190.6 ZT20-23 3194.3 3194.3 3194.3