condition mean min max ZT0-3 0.272158 0.272158 0.272158 ZT4-7 0.5203645 0.5203645 0.5203645 ZT8-11 41.16675 41.16675 41.16675 ZT12-15 35.53495 35.53495 35.53495 ZT16-19 3.7224199999999996 3.7224199999999996 3.7224199999999996 ZT20-23 0.4041095 0.4041095 0.4041095