condition mean min max ZT0-3 0.09662899999999999 0.0 0.19325799999999999 ZT4-7 0.3936955 0.3936955 0.3936955 ZT8-11 0.064759 0.064759 0.064759 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.194486 0.194486 0.194486