condition mean min max ZT0-3 13.877949999999998 13.739249999999998 14.016649999999998 ZT4-7 9.89849 9.89849 9.89849 ZT8-11 14.3419 14.3419 14.3419 ZT12-15 0 0 0 ZT16-19 15.3553 15.3553 15.3553 ZT20-23 10.56985 10.56985 10.56985