condition mean min max ZT0-3 0.316254 0.316254 0.316254 ZT4-7 0.242385 0.242385 0.242385 ZT8-11 0.733614 0.733614 0.733614 ZT12-15 0.657294 0.657294 0.657294 ZT16-19 0.6642435 0.6642435 0.6642435 ZT20-23 0.6501925 0.6501925 0.6501925