condition mean min max ZT0-3 0.5764956666666666 0.525815 0.658855 ZT4-7 0.6000535 0.6000535 0.6000535 ZT8-11 0.4973715 0.4973715 0.4973715 ZT12-15 0.749568 0.5246835 0.9744524999999999 ZT16-19 0.815777 0.815777 0.815777 ZT20-23 0.900014 0.900014 0.900014