condition mean min max ZT0-3 39.522154 39.522154 39.522154 ZT4-7 89.0492515 89.0492515 89.0492515 ZT8-11 115.725055 115.725055 115.725055 ZT12-15 83.6668885 83.6668885 83.6668885 ZT16-19 62.480115 62.480115 62.480115 ZT20-23 46.496711 46.496711 46.496711