condition mean min max ZT0-3 146.616672 146.616672 146.616672 ZT4-7 53.430683 53.430683 53.430683 ZT8-11 46.427349500000005 46.427349500000005 46.427349500000005 ZT12-15 39.878355 39.878355 39.878355 ZT16-19 22.876249 22.876249 22.876249 ZT20-23 39.5137765 39.5137765 39.5137765