condition mean min max ZT0-3 13.94925 13.94925 13.94925 ZT4-7 14.75075 14.75075 14.75075 ZT8-11 8.090254999999999 8.090254999999999 8.090254999999999 ZT12-15 9.89704 9.89704 9.89704 ZT16-19 10.255949999999999 10.255949999999999 10.255949999999999 ZT20-23 13.498899999999999 13.498899999999999 13.498899999999999