condition mean min max ZT0-3 16.5033 16.5033 16.5033 ZT4-7 25.25465 25.25465 25.25465 ZT8-11 18.5163 18.5163 18.5163 ZT12-15 25.869899999999998 25.869899999999998 25.869899999999998 ZT16-19 21.982 21.982 21.982 ZT20-23 21.3125 21.3125 21.3125